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[syzbot] [mm?] [bcachefs?] KASAN: slab-use-after-free Read in list_lru_del | 0 (2) | 2025/03/07 22:42 |
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[syzbot] [mm?] [bcachefs?] KASAN: slab-use-after-free Read in list_lru_del | 0 (2) | 2025/03/07 22:42 |
Zero length message leads to an empty skb ================================================================== BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0xb5/0x190 lib/list_debug.c:65 Read of size 8 at addr ffff888052cd0080 by task syz.0.0/5341 CPU: 0 UID: 0 PID: 5341 Comm: syz.0.0 Not tainted 6.16.0-rc6-syzkaller-00002-g155a3c003e55 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x230 mm/kasan/report.c:480 kasan_report+0x118/0x150 mm/kasan/report.c:593 __list_del_entry_valid_or_report+0xb5/0x190 lib/list_debug.c:65 __list_del_entry_valid include/linux/list.h:124 [inline] __list_del_entry include/linux/list.h:215 [inline] list_del_init include/linux/list.h:287 [inline] list_lru_del+0x98/0x210 mm/list_lru.c:206 gfs2_quota_cleanup+0x21e/0x6f0 fs/gfs2/quota.c:1532 gfs2_make_fs_ro+0x27a/0x300 fs/gfs2/super.c:568 gfs2_reconfigure+0x6a3/0xb20 fs/gfs2/ops_fstype.c:1595 reconfigure_super+0x227/0x890 fs/super.c:1077 do_remount fs/namespace.c:3386 [inline] path_mount+0xd18/0xfe0 fs/namespace.c:4218 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4427 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f001b98e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0017df5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f001bbb6080 RCX: 00007f001b98e929 RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000 RBP: 00007f001ba10ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000003376039 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f001bbb6080 R15: 00007ffeffe94bf8 </TASK> Allocated by task 5340: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204 qd_alloc+0x50/0x250 fs/gfs2/quota.c:234 gfs2_quota_init+0x777/0x1230 fs/gfs2/quota.c:1448 gfs2_make_fs_rw+0x181/0x2b0 fs/gfs2/super.c:149 gfs2_fill_super+0x1a91/0x20e0 fs/gfs2/ops_fstype.c:1278 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1335 vfs_get_tree+0x8f/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3902 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4427 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 0: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4745 gfs2_qd_dealloc+0x70/0xe0 fs/gfs2/quota.c:111 rcu_do_batch kernel/rcu/tree.c:2576 [inline] rcu_core+0xca8/0x1710 kernel/rcu/tree.c:2832 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548 __call_rcu_common kernel/rcu/tree.c:3094 [inline] call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3214 gfs2_quota_sync+0x3c4/0x460 fs/gfs2/quota.c:1361 gfs2_sync_fs+0x4c/0xb0 fs/gfs2/super.c:660 sync_filesystem+0xee/0x230 fs/sync.c:56 gfs2_reconfigure+0xbb/0xb20 fs/gfs2/ops_fstype.c:1555 reconfigure_super+0x227/0x890 fs/super.c:1077 do_remount fs/namespace.c:3386 [inline] path_mount+0xd18/0xfe0 fs/namespace.c:4218 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4427 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888052cd0000 which belongs to the cache gfs2_quotad of size 272 The buggy address is located 128 bytes inside of freed 272-byte region [ffff888052cd0000, ffff888052cd0110) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x52cd0 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff888000684b40 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x52c50(GFP_NOFS|__GFP_RECLAIMABLE|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5340, tgid 5339 (syz.0.0), ts 68650702778, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2451 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2619 new_slab mm/slub.c:2673 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859 __slab_alloc mm/slub.c:3949 [inline] __slab_alloc_node mm/slub.c:4024 [inline] slab_alloc_node mm/slub.c:4185 [inline] kmem_cache_alloc_noprof+0x283/0x3c0 mm/slub.c:4204 qd_alloc+0x50/0x250 fs/gfs2/quota.c:234 gfs2_quota_init+0x777/0x1230 fs/gfs2/quota.c:1448 gfs2_make_fs_rw+0x181/0x2b0 fs/gfs2/super.c:149 gfs2_fill_super+0x1a91/0x20e0 fs/gfs2/ops_fstype.c:1278 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1335 vfs_get_tree+0x8f/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3902 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4427 page_owner free stack trace missing Memory state around the buggy address: ffff888052ccff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888052cd0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888052cd0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888052cd0100: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 ffff888052cd0180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/07/16 23:52 | upstream | 155a3c003e55 | 44f8051e | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/07/02 22:02 | upstream | b4911fb0b060 | 0cd59a8f | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/06/27 18:06 | upstream | 67a993863163 | 803ce19b | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/06/25 16:05 | upstream | 7595b66ae9de | 26d77996 | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/05/31 06:36 | upstream | 8477ab143069 | 3d2f584d | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/05/29 16:38 | upstream | 90b83efa6701 | 3d2f584d | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/05/21 21:38 | upstream | 4a95bc121ccd | f6063999 | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/05/05 18:20 | upstream | 92a09c47464d | 6ca47dd8 | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/04/25 07:20 | upstream | e72e9e693307 | e3715315 | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/04/06 07:03 | upstream | 56f944529ec2 | 1c65791e | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/04/01 18:47 | upstream | 08733088b566 | b8645499 | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/03/21 21:27 | upstream | d07de43e3f05 | c6512ef7 | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/02/20 22:50 | upstream | e9a8cac0bf89 | 0808a665 | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/02/06 06:31 | upstream | 92514ef226f5 | 577d049b | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | KASAN: slab-use-after-free Read in list_lru_del | |||
2025/03/01 18:44 | upstream | 03d38806a902 | c3901742 | .config | console log | report | syz / log | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-upstream-fs | BUG: corrupted list in list_lru_del | ||
2025/02/19 02:47 | upstream | 6537cfb395f3 | 9a14138f | .config | console log | report | syz / log | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-upstream-fs | BUG: corrupted list in list_lru_del | ||
2025/02/06 13:59 | upstream | 92514ef226f5 | 1e1faf27 | .config | console log | report | syz / log | [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] | ci-snapshot-upstream-root | BUG: corrupted list in list_lru_del |