ci starts bisection 2023-05-19 21:31:31.927622736 +0000 UTC m=+2031.046882613 bisecting fixing commit since a3671bd86a9770e34969522d29bb30a1b66fd88a building syzkaller on 7939252e4ddf50bbb9912069a40d32f6c83c4f8e ensuring issue is reproducible on original commit a3671bd86a9770e34969522d29bb30a1b66fd88a testing commit a3671bd86a9770e34969522d29bb30a1b66fd88a gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: d482223ae44eb8c7cd588e060a93c084bbc85ccdce42af0b6fd1be12120032cb run #0: crashed: KASAN: invalid-free in diUnmount run #1: crashed: WARNING in diUnmount run #2: crashed: WARNING in diUnmount run #3: crashed: WARNING in diUnmount run #4: crashed: KASAN: invalid-free in diUnmount run #5: crashed: WARNING in diUnmount run #6: crashed: WARNING in diUnmount run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK reproducer seems to be flaky testing current HEAD d3f704310cc7e04e89d178ea080a2e74dae9db67 testing commit d3f704310cc7e04e89d178ea080a2e74dae9db67 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 4661b8268dd499ded8999e28bb36688822abc5c49eb9ee47266ee8ac1cd9728d run #0: crashed: KASAN: invalid-free in diUnmount run #1: crashed: KASAN: invalid-free in diUnmount run #2: crashed: KASAN: invalid-free in diUnmount run #3: crashed: KASAN: invalid-free in diUnmount run #4: crashed: WARNING in diUnmount run #5: crashed: WARNING in diUnmount run #6: OK run #7: crashed: KASAN: invalid-free in diUnmount run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK crash still not fixed/happens on the oldest tested release Reproducer flagged being flaky revisions tested: 2, total time: 35m40.526245705s (build: 17m7.511207232s, test: 17m55.118950153s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Merge tag 'pm-6.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm crash: KASAN: invalid-free in diUnmount ================================================================== BUG: KASAN: double-free in slab_free mm/slub.c:3786 [inline] BUG: KASAN: double-free in __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3799 Free of addr ffff8880213c8000 by task syz-executor.2/5345 CPU: 0 PID: 5345 Comm: syz-executor.2 Not tainted 6.4.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x64/0xb0 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report_invalid_free+0xe8/0x100 mm/kasan/report.c:537 ____kasan_slab_free+0x185/0x1c0 mm/kasan/common.c:225 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3786 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3799 diUnmount+0xda/0x120 fs/jfs/jfs_imap.c:195 jfs_umount+0x16e/0x3f0 fs/jfs/jfs_umount.c:63 jfs_put_super+0x6d/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x13a/0x420 fs/super.c:500 kill_block_super+0x9a/0xe0 fs/super.c:1407 deactivate_locked_super+0x7f/0x130 fs/super.c:331 cleanup_mnt+0x253/0x360 fs/namespace.c:1177 task_work_run+0x12f/0x220 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f443ac8d567 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 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:00007ffef9c2a3f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f443ac8d567 RDX: 00007ffef9c2a4cb RSI: 000000000000000a RDI: 00007ffef9c2a4c0 RBP: 00007ffef9c2a4c0 R08: 00000000ffffffff R09: 00007ffef9c2a290 R10: 0000555555f14893 R11: 0000000000000246 R12: 00007f443ace6b74 R13: 00007ffef9c2b580 R14: 0000555555f14810 R15: 00007ffef9c2b5c0 Allocated by task 5372: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc+0x5e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] tomoyo_realpath_from_path+0xa8/0x660 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x23f/0x2e0 security/tomoyo/file.c:771 security_file_open+0x38/0x80 security/security.c:2797 do_dentry_open+0x33e/0x1140 fs/open.c:907 do_open fs/namei.c:3636 [inline] path_openat+0x12a5/0x2280 fs/namei.c:3791 do_filp_open+0x1a9/0x3e0 fs/namei.c:3818 do_sys_openat2+0x11e/0x3f0 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x11f/0x1d0 fs/open.c:1383 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5372: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3786 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3799 tomoyo_realpath_from_path+0x143/0x660 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x23f/0x2e0 security/tomoyo/file.c:771 security_file_open+0x38/0x80 security/security.c:2797 do_dentry_open+0x33e/0x1140 fs/open.c:907 do_open fs/namei.c:3636 [inline] path_openat+0x12a5/0x2280 fs/namei.c:3791 do_filp_open+0x1a9/0x3e0 fs/namei.c:3818 do_sys_openat2+0x11e/0x3f0 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x11f/0x1d0 fs/open.c:1383 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8880213c8000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 0 bytes inside of 4096-byte region [ffff8880213c8000, ffff8880213c9000) The buggy address belongs to the physical page: page:ffffea000084f200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x213c8 head:ffffea000084f200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888011442140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5372, tgid 5372 (udevd), ts 399711341117, free_ts 399692631761 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3502 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3192 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291 __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3490 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc+0x4e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] tomoyo_realpath_from_path+0xa8/0x660 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x23f/0x2e0 security/tomoyo/file.c:771 security_file_open+0x38/0x80 security/security.c:2797 do_dentry_open+0x33e/0x1140 fs/open.c:907 do_open fs/namei.c:3636 [inline] path_openat+0x12a5/0x2280 fs/namei.c:3791 do_filp_open+0x1a9/0x3e0 fs/namei.c:3818 do_sys_openat2+0x11e/0x3f0 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x11f/0x1d0 fs/open.c:1383 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x629/0xca0 mm/page_alloc.c:2564 free_unref_page+0x33/0x370 mm/page_alloc.c:2659 diMount+0x765/0x810 fs/jfs/jfs_imap.c:115 jfs_mount_rw+0x1fe/0x600 fs/jfs/jfs_mount.c:240 jfs_remount+0x450/0x5b0 fs/jfs/super.c:454 reconfigure_super+0x24c/0x8e0 fs/super.c:956 vfs_fsconfig_locked fs/fsopen.c:254 [inline] __do_sys_fsconfig+0x78d/0x9a0 fs/fsopen.c:439 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff8880213c7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880213c7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880213c8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880213c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880213c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================