ci starts bisection 2022-08-25 13:10:23.646115323 +0000 UTC m=+86022.795009624
bisecting fixing commit since 4b0986a3613c92f4ec1bdc7f60ec66fea135991f
building syzkaller on 4c7657cb23023fd64d0585c979e6fec4ef441f04
testing commit 4b0986a3613c92f4ec1bdc7f60ec66fea135991f
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: a612a36b92916ffb721db076afd5563b93f09789bab4befe0eb25742333d100c
run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe
run #1: crashed: KASAN: use-after-free Write in udf_close_lvid
run #2: crashed: KASAN: slab-out-of-bounds Write in udf_open_lvid
run #3: crashed: KASAN: slab-out-of-bounds Write in udf_open_lvid
run #4: crashed: KASAN: slab-out-of-bounds Write in udf_close_lvid
run #5: crashed: KASAN: slab-out-of-bounds Write in udf_open_lvid
run #6: crashed: KASAN: use-after-free Write in udf_open_lvid
run #7: crashed: KASAN: slab-out-of-bounds Write in udf_close_lvid
run #8: crashed: KASAN: slab-out-of-bounds Write in udf_open_lvid
run #9: crashed: KASAN: use-after-free Write in udf_open_lvid
run #10: crashed: KASAN: slab-out-of-bounds Write in udf_close_lvid
run #11: crashed: KASAN: use-after-free Write in udf_close_lvid
run #12: crashed: KASAN: slab-out-of-bounds Write in udf_close_lvid
run #13: crashed: KASAN: use-after-free Write in udf_close_lvid
run #14: crashed: KASAN: use-after-free Write in udf_open_lvid
run #15: crashed: KASAN: use-after-free Write in udf_open_lvid
run #16: crashed: KASAN: use-after-free Write in udf_open_lvid
run #17: crashed: KASAN: use-after-free Write in udf_close_lvid
run #18: crashed: KASAN: slab-out-of-bounds Write in udf_close_lvid
run #19: OK
testing current HEAD c40e8341e3b3bb27e3a65b06b5b454626234c4f0
testing commit c40e8341e3b3bb27e3a65b06b5b454626234c4f0
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 508471dc81410cfe774d0d9d3d48f7bda7085b8c38ab744865292451308de8bb
run #0: crashed: KASAN: slab-out-of-bounds Write in udf_open_lvid
run #1: crashed: KASAN: use-after-free Write in udf_open_lvid
run #2: crashed: KASAN: slab-out-of-bounds Write in udf_close_lvid
run #3: crashed: KASAN: slab-out-of-bounds Write in udf_close_lvid
run #4: crashed: KASAN: use-after-free Write in udf_close_lvid
run #5: crashed: general protection fault in batadv_tt_purge
run #6: crashed: KASAN: slab-out-of-bounds Write in udf_close_lvid
run #7: crashed: KASAN: use-after-free Write in udf_open_lvid
run #8: crashed: KASAN: use-after-free Write in udf_open_lvid
run #9: OK
revisions tested: 2, total time: 39m8.788509403s (build: 15m50.012669543s, test: 22m24.581257508s)
the crash still happens on HEAD
commit msg: Merge tag 'cgroup-for-6.0-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
crash: KASAN: use-after-free Write in udf_open_lvid
==================================================================
BUG: KASAN: use-after-free in udf_open_lvid.isra.0+0x221/0x270 fs/udf/super.c:2042
Write of size 1 at addr ffff88801f069f80 by task syz-executor405/13407

CPU: 0 PID: 13407 Comm: syz-executor405 Not tainted 6.0.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:317 [inline]
 print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495
 udf_open_lvid.isra.0+0x221/0x270 fs/udf/super.c:2042
 udf_fill_super+0x112a/0x16c0 fs/udf/super.c:2278
 mount_bdev+0x2cb/0x3b0 fs/super.c:1400
 legacy_get_tree+0xfa/0x1f0 fs/fs_context.c:610
 vfs_get_tree+0x7f/0x2c0 fs/super.c:1530
 do_new_mount fs/namespace.c:3040 [inline]
 path_mount+0x43a/0x1a10 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5dbcdde07a
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5dbcd89168 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5dbcd891c0 RCX: 00007f5dbcdde07a
RDX: 0000000020000000 RSI: 0000000020000700 RDI: 00007f5dbcd89180
RBP: 000000000000000e R08: 00007f5dbcd891c0 R09: 00007f5dbcd896b8
R10: 0000000000000810 R11: 0000000000000286 R12: 00007f5dbcd89180
R13: 0000000020000350 R14: 0000000000000003 R15: 0000000000000004
 </TASK>

The buggy address belongs to the physical page:
page:ffffea00007c1a40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f069
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 ffffffff007c0301 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3606, tgid 3606 (syz-executor.0), ts 38518566478, free_ts 441977580990
 prep_new_page mm/page_alloc.c:2532 [inline]
 get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283
 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5515
 alloc_slab_page mm/slub.c:1824 [inline]
 allocate_slab+0x27e/0x3d0 mm/slub.c:1969
 new_slab mm/slub.c:2029 [inline]
 ___slab_alloc+0x7f1/0xe00 mm/slub.c:3031
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3118
 slab_alloc_node mm/slub.c:3209 [inline]
 slab_alloc mm/slub.c:3251 [inline]
 __kmalloc_track_caller+0x30f/0x330 mm/slub.c:4924
 kmemdup+0x18/0x40 mm/util.c:129
 neigh_sysctl_register+0x92/0x5f0 net/core/neighbour.c:3787
 devinet_sysctl_register+0x8a/0x1e0 net/ipv4/devinet.c:2623
 inetdev_init+0x221/0x480 net/ipv4/devinet.c:279
 inetdev_event+0x92d/0x1500 net/ipv4/devinet.c:1534
 notifier_call_chain+0x94/0x170 kernel/notifier.c:87
 call_netdevice_notifiers_extack net/core/dev.c:1983 [inline]
 call_netdevice_notifiers net/core/dev.c:1997 [inline]
 register_netdevice+0xd85/0x1320 net/core/dev.c:10103
 rtnl_newlink_create net/core/rtnetlink.c:3365 [inline]
 __rtnl_newlink+0x1108/0x14c0 net/core/rtnetlink.c:3580
 rtnl_newlink+0x5a/0x90 net/core/rtnetlink.c:3593
 rtnetlink_rcv_msg+0x32d/0x9a0 net/core/rtnetlink.c:6090
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1449 [inline]
 free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499
 free_unref_page_prepare mm/page_alloc.c:3380 [inline]
 free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:447
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:727 [inline]
 slab_alloc_node mm/slub.c:3243 [inline]
 slab_alloc mm/slub.c:3251 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3258 [inline]
 kmem_cache_alloc+0x267/0x3b0 mm/slub.c:3268
 getname_flags.part.0+0x4a/0x440 fs/namei.c:139
 do_sys_openat2+0xd2/0x3f0 fs/open.c:1305
 do_sys_open fs/open.c:1327 [inline]
 __do_sys_openat fs/open.c:1343 [inline]
 __se_sys_openat fs/open.c:1338 [inline]
 __x64_sys_openat+0x11b/0x1d0 fs/open.c:1338
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff88801f069e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88801f069f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88801f069f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88801f06a000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88801f06a080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================