syzbot


possible deadlock in shmem_fallocate (2)

Status: auto-closed as invalid on 2020/09/14 02:25
Reported-by: syzbot+5f45c924884208b0358e@syzkaller.appspotmail.com
First crash: 1452d, last: 1384d
Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream possible deadlock in shmem_fallocate mm 8087 2325d 2369d 0/26 closed as invalid on 2017/11/05 09:38
linux-4.19 possible deadlock in shmem_fallocate 1 1674d 1673d 0/1 auto-closed as invalid on 2019/11/29 05:22
android-49 possible deadlock in shmem_fallocate C 2441 1548d 1785d 0/3 public: reported C repro on 2019/04/11 08:44
android-414 possible deadlock in shmem_fallocate C 7876 1549d 1786d 0/1 public: reported C repro on 2019/04/11 00:00
upstream possible deadlock in shmem_fallocate (3) mm 1 1638d 1634d 0/26 auto-closed as invalid on 2019/11/05 02:34
upstream possible deadlock in shmem_fallocate (4) mm C done 81 1311d 1526d 15/26 fixed on 2020/09/16 22:51
upstream possible deadlock in shmem_fallocate (2) mm C 1325 1821d 2029d 11/26 fixed on 2019/03/28 12:00

Sample crash report:
binder: 17808:17810 unknown command 1074055543
binder: 17808:17810 ioctl c0306201 20000280 returned -22
binder: 17808:17810 ioctl 80045430 7faaf0239bcc returned -22
======================================================
WARNING: possible circular locking dependency detected
4.19.123-syzkaller #0 Not tainted
------------------------------------------------------
khugepaged/1085 is trying to acquire lock:
0000000037b7e4d9 (&sb->s_type->i_mutex_key#15){+.+.}, at: inode_lock include/linux/fs.h:748 [inline]
0000000037b7e4d9 (&sb->s_type->i_mutex_key#15){+.+.}, at: shmem_fallocate+0x15a/0xd40 mm/shmem.c:2681

but task is already holding lock:
000000003d421473 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/compiler.h:193

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (fs_reclaim){+.+.}:
       fs_reclaim_acquire mm/page_alloc.c:4343 [inline]
       prepare_alloc_pages mm/page_alloc.c:4340 [inline]
       __alloc_pages_nodemask+0x4b7/0x6a0 mm/page_alloc.c:4392
       alloc_pages_vma+0xd9/0x580 mm/mempolicy.c:2161
       shmem_alloc_page+0xb0/0x170 mm/shmem.c:1494
       shmem_alloc_and_acct_page+0x160/0x960 mm/shmem.c:1519
       shmem_getpage_gfp+0x3fb/0x3840 mm/shmem.c:1797
       shmem_getpage mm/shmem.c:132 [inline]
       shmem_write_begin+0x108/0x1e0 mm/shmem.c:2433
       generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3162
       __generic_file_write_iter+0x24c/0x610 mm/filemap.c:3287
       generic_file_write_iter+0x37f/0x729 mm/filemap.c:3315
       call_write_iter include/linux/fs.h:1821 [inline]
       new_sync_write fs/read_write.c:474 [inline]
       __vfs_write+0x512/0x760 fs/read_write.c:487
       vfs_write+0x206/0x550 fs/read_write.c:549
       ksys_write+0x12b/0x2a0 fs/read_write.c:599
       do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #0 (&sb->s_type->i_mutex_key#15){+.+.}:
       down_write+0x34/0x90 kernel/locking/rwsem.c:70
       inode_lock include/linux/fs.h:748 [inline]
       shmem_fallocate+0x15a/0xd40 mm/shmem.c:2681
       ashmem_shrink_scan drivers/staging/android/ashmem.c:489 [inline]
       ashmem_shrink_scan+0x34d/0x500 drivers/staging/android/ashmem.c:464
       do_shrink_slab+0x3c7/0xa20 mm/vmscan.c:537
       shrink_slab mm/vmscan.c:693 [inline]
       shrink_slab+0x16f/0x550 mm/vmscan.c:666
       shrink_node+0x2e6/0x1350 mm/vmscan.c:2740
       shrink_zones mm/vmscan.c:2969 [inline]
       do_try_to_free_pages+0x3a3/0x1090 mm/vmscan.c:3027
       try_to_free_pages+0x2c5/0x7c0 mm/vmscan.c:3242
       __perform_reclaim mm/page_alloc.c:3799 [inline]
       __alloc_pages_direct_reclaim mm/page_alloc.c:3820 [inline]
       __alloc_pages_slowpath+0x938/0x26a0 mm/page_alloc.c:4210
       __alloc_pages_nodemask+0x5b6/0x6a0 mm/page_alloc.c:4418
       __alloc_pages include/linux/gfp.h:496 [inline]
       __alloc_pages_node include/linux/gfp.h:509 [inline]
       khugepaged_alloc_page+0x8e/0x180 mm/khugepaged.c:773
       collapse_huge_page+0x114/0x3ba0 mm/khugepaged.c:963
       khugepaged_scan_pmd mm/khugepaged.c:1219 [inline]
       khugepaged_scan_mm_slot mm/khugepaged.c:1757 [inline]
       khugepaged_do_scan mm/khugepaged.c:1838 [inline]
       khugepaged+0x2ee9/0x3f70 mm/khugepaged.c:1883
       kthread+0x34a/0x420 kernel/kthread.c:246
       ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(fs_reclaim);
                               lock(&sb->s_type->i_mutex_key#15);
                               lock(fs_reclaim);
  lock(&sb->s_type->i_mutex_key#15);

 *** DEADLOCK ***

2 locks held by khugepaged/1085:
 #0: 000000003d421473 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/compiler.h:193
 #1: 000000003c81ce6e (shrinker_rwsem){++++}, at: shrink_slab mm/vmscan.c:683 [inline]
 #1: 000000003c81ce6e (shrinker_rwsem){++++}, at: shrink_slab+0xc7/0x550 mm/vmscan.c:666

stack backtrace:
CPU: 1 PID: 1085 Comm: khugepaged Not tainted 4.19.123-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 print_circular_bug.isra.0.cold+0x1c4/0x282 kernel/locking/lockdep.c:1221
 check_prev_add kernel/locking/lockdep.c:1865 [inline]
 check_prevs_add kernel/locking/lockdep.c:1978 [inline]
 validate_chain kernel/locking/lockdep.c:2419 [inline]
 __lock_acquire+0x2e19/0x49c0 kernel/locking/lockdep.c:3415
 lock_acquire+0x170/0x400 kernel/locking/lockdep.c:3907
 down_write+0x34/0x90 kernel/locking/rwsem.c:70
 inode_lock include/linux/fs.h:748 [inline]
 shmem_fallocate+0x15a/0xd40 mm/shmem.c:2681
 ashmem_shrink_scan drivers/staging/android/ashmem.c:489 [inline]
 ashmem_shrink_scan+0x34d/0x500 drivers/staging/android/ashmem.c:464
 do_shrink_slab+0x3c7/0xa20 mm/vmscan.c:537
 shrink_slab mm/vmscan.c:693 [inline]
 shrink_slab+0x16f/0x550 mm/vmscan.c:666
 shrink_node+0x2e6/0x1350 mm/vmscan.c:2740
 shrink_zones mm/vmscan.c:2969 [inline]
 do_try_to_free_pages+0x3a3/0x1090 mm/vmscan.c:3027
 try_to_free_pages+0x2c5/0x7c0 mm/vmscan.c:3242
 __perform_reclaim mm/page_alloc.c:3799 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:3820 [inline]
 __alloc_pages_slowpath+0x938/0x26a0 mm/page_alloc.c:4210
 __alloc_pages_nodemask+0x5b6/0x6a0 mm/page_alloc.c:4418
 __alloc_pages include/linux/gfp.h:496 [inline]
 __alloc_pages_node include/linux/gfp.h:509 [inline]
 khugepaged_alloc_page+0x8e/0x180 mm/khugepaged.c:773
 collapse_huge_page+0x114/0x3ba0 mm/khugepaged.c:963
 khugepaged_scan_pmd mm/khugepaged.c:1219 [inline]
 khugepaged_scan_mm_slot mm/khugepaged.c:1757 [inline]
 khugepaged_do_scan mm/khugepaged.c:1838 [inline]
 khugepaged+0x2ee9/0x3f70 mm/khugepaged.c:1883
 kthread+0x34a/0x420 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
binder: 17808:17810 unknown command 1074055543
binder: 17808:17810 ioctl c0306201 20000280 returned -22
binder: 17808:17810 ioctl 80045430 7faaf0239bcc returned -22
validate_nla: 36 callbacks suppressed
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder_alloc: 17873: binder_alloc_buf, no vma
binder: BINDER_SET_CONTEXT_MGR already set
binder: 17873:17877 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 17873:17877 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder_alloc: 17873: binder_alloc_buf, no vma
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: 17873:17887 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: 17873:17877 ioctl 40046207 0 returned -16
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder_alloc: 17962: binder_alloc_buf, no vma
binder: 17962:17967 ioctl c0306201 20000240 returned -14
binder: 17980:17982 unknown command 1073741824
binder: 17980:17982 ioctl c0306201 20000280 returned -22
binder: 17980:17982 unknown command 1073741824
binder: 17980:17982 ioctl c0306201 20000280 returned -22
binder: 17988:17991 unknown command 1464663858
binder: 17988:17991 ioctl c0306201 20000280 returned -22
binder: 17988:17991 ioctl 8982 20000040 returned -22
binder: 17988:17997 unknown command 1464663858
binder: 17988:17997 ioctl c0306201 20000280 returned -22
binder: 17988:17997 ioctl 8982 20000040 returned -22
binder_alloc: 18012: binder_alloc_buf, no vma
binder: 18012:18018 ioctl c0585611 20000180 returned -22
binder: 18012:18018 ioctl c0585611 20000180 returned -22
binder_alloc: 18029: binder_alloc_buf, no vma
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18029:18034 ioctl 40046207 0 returned -16
binder_alloc: 18045: binder_alloc_buf, no vma
binder_alloc: 18062: binder_alloc_buf, no vma
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18062:18065 ioctl 40046207 0 returned -16
binder_alloc: 18062: binder_alloc_buf, no vma
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18062:18070 ioctl 40046207 0 returned -16
binder_alloc: 18075: binder_alloc_buf, no vma
binder: 18077:18082 unknown command 1075127045
binder: 18077:18082 ioctl c0306201 20000200 returned -22
binder_alloc: 18075: binder_alloc_buf, no vma
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18094:18102 unknown command 90885
binder: 18091:18098 ioctl 40046207 0 returned -16
binder: 18094:18102 ioctl c0306201 20000200 returned -22
binder: 18091:18098 unknown command 0
binder: 18091:18098 ioctl c0306201 20000200 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18091:18098 ioctl 40046207 0 returned -16
binder: 18091:18098 ioctl 40345622 20000000 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18122:18128 ioctl 40046207 0 returned -16
binder: 18121:18125 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18122:18128 ioctl 40046207 0 returned -16
binder: 18121:18125 ioctl 40046207 0 returned -16
binder: 18122:18128 ioctl 808c563d 20000180 returned -22
binder: 18121:18125 ioctl 89e0 20000180 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18121:18131 ioctl 40046207 0 returned -16
binder: 18122:18130 ioctl 40046207 0 returned -16
binder: 18121:18133 unknown command 0
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18121:18134 ioctl 89e0 20000180 returned -22
binder: 18121:18125 ioctl 40046207 0 returned -16
binder: 18121:18133 ioctl c0306201 20000240 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18122:18130 ioctl 40046207 0 returned -16
binder: 18122:18136 ioctl 808c563d 20000180 returned -22
binder: 18094:18111 unknown command 90885
binder: 18094:18111 ioctl c0306201 20000200 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
validate_nla: 32 callbacks suppressed
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: 18143:18147 ioctl 40046207 0 returned -16
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18143:18147 ioctl 40046207 0 returned -16
binder: 18143:18147 ioctl 40087705 20000040 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18153:18158 ioctl 40046207 0 returned -16
binder: 18143:18147 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18143:18165 ioctl 40087705 20000040 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18143:18160 ioctl 40046207 0 returned -16
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: 18153:18158 ioctl 40046207 0 returned -16
binder: 18153:18158 ioctl c0105303 20000040 returned -22
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18155:18164 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18153:18170 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18153:18170 ioctl 40046207 0 returned -16
binder: 18169:18175 unknown command 0
binder: BINDER_SET_CONTEXT_MGR already set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18169:18175 ioctl c0306201 20000200 returned -22
binder: 18171:18177 ioctl 40046207 0 returned -16
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: 18174:18178 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18171:18177 ioctl 40046207 0 returned -16
binder: 18174:18178 ioctl 40046207 0 returned -16
binder: 18171:18177 ioctl 4008ae8a 20000180 returned -22
binder: 18169:18175 unknown command 0
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18169:18175 ioctl c0306201 20000200 returned -22
binder: 18171:18177 ioctl 4008ae9c 200002c0 returned -22
binder: 18174:18178 ioctl 40046207 0 returned -16
binder: 18174:18188 unknown command 1802723700
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18174:18188 ioctl c0306201 20000240 returned -22
binder: 18174:18187 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18171:18191 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18171:18191 ioctl 40046207 0 returned -16
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: 18171:18177 ioctl 4008ae8a 20000180 returned -22
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: 18171:18191 ioctl 4008ae9c 200002c0 returned -22
binder_alloc: 18194: binder_alloc_buf, no vma
binder: BINDER_SET_CONTEXT_MGR already set
binder_alloc: 18194: binder_alloc_buf, no vma
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: 18201:18204 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
netlink: 'syz-executor.1': attribute type 5 has an invalid length.
binder: 18201:18204 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18208:18211 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18201:18204 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18201:18213 ioctl 40046207 0 returned -16
binder: 18208:18211 unknown command -639748091
binder: 18208:18211 ioctl c0306201 20000200 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18208:18211 ioctl 40046207 0 returned -16
binder: 18208:18211 ioctl 4b68 20000040 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18208:18211 ioctl 40046207 0 returned -16
binder: 18208:18220 ioctl 4b68 20000040 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18224:18232 unknown command 1074004229
binder: 18227:18230 ioctl 40046207 0 returned -16
binder: 18224:18232 ioctl c0306201 20000200 returned -22
binder: 18224:18232 ioctl 40087708 20000040 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18223:18239 ioctl 40046207 0 returned -16
binder: 18224:18232 unknown command 1074004229
binder: 18224:18244 ioctl 40087708 20000040 returned -22
binder: 18224:18232 ioctl c0306201 20000200 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18223:18239 ioctl 40046207 0 returned -16
binder: 18227:18230 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18249:18254 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18249:18254 ioctl 40046207 0 returned -16
binder: 18249:18254 ioctl 80885659 20000440 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18249:18265 ioctl 40046207 0 returned -16
binder: 18249:18265 ioctl 80885659 20000440 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18275:18281 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18275:18281 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18275:18281 ioctl 40046207 0 returned -16
binder: 18275:18291 unknown command 4
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18275:18290 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18275:18291 ioctl c0306201 20000240 returned -22
binder: 18287:18294 ioctl 40046207 0 returned -16
binder: 18280:18296 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18287:18294 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18287:18294 unknown command -1897380089
binder: 18287:18294 ioctl c0306201 20000280 returned -22
binder: 18280:18296 ioctl 40046207 0 returned -16
netlink: 48 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 48 bytes leftover after parsing attributes in process `syz-executor.1'.
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18287:18308 ioctl 40046207 0 returned -16
binder: 18310:18316 ioctl 7010 0 returned -22
binder: 18287:18294 unknown command -1897380089
binder: 18287:18294 ioctl c0306201 20000280 returned -22
binder: 18310:18316 ioctl 7010 0 returned -22
binder: 18321:18325 unknown command 1076102917
binder: 18321:18325 ioctl c0306201 20000200 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18321:18325 unknown command 1076102917
binder: 18327:18330 ioctl 40046207 0 returned -16
binder: 18321:18325 ioctl c0306201 20000200 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18327:18330 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18327:18330 ioctl 40087708 200011c0 returned -22
binder: 18327:18338 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18327:18330 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18350:18357 unknown command 1560568581
binder: 18348:18353 ioctl 40046207 0 returned -16
binder: 18350:18357 ioctl c0306201 20000200 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18350:18357 unknown command 3
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18358:18360 ioctl 40046207 0 returned -16
binder: 18348:18361 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18350:18357 ioctl c0306201 200002c0 returned -22
binder: 18358:18360 ioctl 40046207 0 returned -16
binder: 18348:18361 unknown command 1392796421
binder: 18358:18360 ioctl 800443d3 20000040 returned -22
binder: 18348:18361 ioctl c0306201 20000200 returned -22
binder: 18350:18367 ioctl 89e0 20000180 returned -22
binder: 18348:18353 unknown command 0
binder: 18348:18353 ioctl c0306201 20000280 returned -22
binder: 18350:18367 unknown command 1560568581
binder: 18350:18367 ioctl c0306201 20000200 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18358:18360 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18358:18370 ioctl 40046207 0 returned -16
binder: 18350:18357 unknown command 3
binder: 18350:18357 ioctl c0306201 200002c0 returned -22
binder: 18350:18367 ioctl 89e0 20000180 returned -22
binder: 18358:18376 ioctl 800443d3 20000040 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18375:18380 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18375:18380 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder_alloc: 18383: binder_alloc_buf, no vma
binder: 18375:18380 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18383:18384 ioctl 40046207 0 returned -16
binder: 18375:18388 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18383:18384 ioctl 40046207 0 returned -16
binder: 18375:18389 ioctl 40046207 0 returned -16
binder_alloc: 18383: binder_alloc_buf, no vma
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18375:18389 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18383:18384 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18383:18390 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder_alloc: binder_alloc_mmap_handler: 18400 20701000-20702000 already mapped failed -16
binder: 18399:18404 ioctl 40046207 0 returned -16
binder_alloc: binder_alloc_mmap_handler: 18400 20701000-20702000 already mapped failed -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18399:18404 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18398:18403 ioctl 40046207 0 returned -16
binder: 18399:18404 ioctl 80404518 20000180 returned -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: BINDER_SET_CONTEXT_MGR already set
binder: BINDER_SET_CONTEXT_MGR already set
binder: 18398:18415 ioctl 40046207 0 returned -16
binder: 18399:18404 ioctl 40046207 0 returned -16

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/05/17 02:24 linux-4.19.y 258f0cf7ac3b 37bccd4e .config console log report ci2-linux-4-19
2020/03/10 04:26 linux-4.19.y 7472c4028e23 35f53e45 .config console log report ci2-linux-4-19
* Struck through repros no longer work on HEAD.