Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
linux-6.1 | KASAN: use-after-free Read in gfs2_quotad origin:lts-only | C | inconclusive | 4 | 17d | 60d | 0/3 | upstream: reported C repro on 2025/04/13 18:37 |
syzbot |
sign-in | mailing list | source | docs |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
linux-6.1 | KASAN: use-after-free Read in gfs2_quotad origin:lts-only | C | inconclusive | 4 | 17d | 60d | 0/3 | upstream: reported C repro on 2025/04/13 18:37 |
================================================================== BUG: KASAN: use-after-free in __lock_acquire+0xf7/0x7c60 kernel/locking/lockdep.c:4882 Read of size 8 at addr ffff8880571ecbb0 by task gfs2_quotad/7282 CPU: 1 PID: 7282 Comm: gfs2_quotad Not tainted 5.15.185-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: <TASK> dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 __lock_acquire+0xf7/0x7c60 kernel/locking/lockdep.c:4882 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162 finish_wait+0xb5/0x1d0 kernel/sched/wait.c:407 gfs2_quotad+0x703/0x880 fs/gfs2/quota.c:1605 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 </TASK> Allocated by task 5738: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3233 getname_flags+0xb5/0x500 fs/namei.c:138 user_path_at_empty+0x2a/0x190 fs/namei.c:2882 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x102/0x4d0 fs/stat.c:221 vfs_fstatat fs/stat.c:243 [inline] __do_sys_newfstatat fs/stat.c:411 [inline] __se_sys_newfstatat fs/stat.c:405 [inline] __x64_sys_newfstatat+0x12c/0x1b0 fs/stat.c:405 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 5738: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xea/0x170 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kmem_cache_free+0x8f/0x210 mm/slub.c:3515 putname fs/namei.c:271 [inline] user_path_at_empty+0x13e/0x190 fs/namei.c:2885 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x102/0x4d0 fs/stat.c:221 vfs_fstatat fs/stat.c:243 [inline] __do_sys_newfstatat fs/stat.c:411 [inline] __se_sys_newfstatat fs/stat.c:405 [inline] __x64_sys_newfstatat+0x12c/0x1b0 fs/stat.c:405 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff8880571ec400 which belongs to the cache names_cache of size 4096 The buggy address is located 1968 bytes inside of 4096-byte region [ffff8880571ec400, ffff8880571ed400) The buggy address belongs to the page: page:ffffea00015c7a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x571e8 head:ffffea00015c7a00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff8880169e9500 raw: 0000000000000000 0000000000070007 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 7867, ts 197548051844, free_ts 197472107457 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5474 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1975 ___slab_alloc+0x81e/0xdf0 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x195/0x290 mm/slub.c:3233 getname_flags+0xb5/0x500 fs/namei.c:138 getname fs/namei.c:217 [inline] __do_sys_symlinkat fs/namei.c:4475 [inline] __se_sys_symlinkat fs/namei.c:4472 [inline] __x64_sys_symlinkat+0x78/0xa0 fs/namei.c:4472 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x94/0x280 mm/page_alloc.c:3396 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3233 getname_flags+0xb5/0x500 fs/namei.c:138 getname fs/namei.c:217 [inline] __do_sys_symlinkat fs/namei.c:4475 [inline] __se_sys_symlinkat fs/namei.c:4472 [inline] __x64_sys_symlinkat+0x78/0xa0 fs/namei.c:4472 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff8880571eca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880571ecb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880571ecb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880571ecc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880571ecc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/06/06 12:35 | linux-5.15.y | 1c700860e8bc | 9fa58bba | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | KASAN: use-after-free Read in gfs2_quotad |