Title | Replies (including bot) | Last reply |
---|---|---|
[syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log | 1 (3) | 2024/09/29 05:09 |
syzbot |
sign-in | mailing list | source | docs |
Title | Replies (including bot) | Last reply |
---|---|---|
[syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_flush_truncate_log | 1 (3) | 2024/09/29 05:09 |
================================================================== BUG: KASAN: use-after-free in ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5959 [inline] BUG: KASAN: use-after-free in __ocfs2_flush_truncate_log+0x824/0x1250 fs/ocfs2/alloc.c:6054 Read of size 4 at addr ffff888045e6fac0 by task kworker/u4:3/41 CPU: 0 UID: 0 PID: 41 Comm: kworker/u4:3 Not tainted 6.11.0-syzkaller-09959-gabf2050f51fd #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: ocfs2_wq ocfs2_truncate_log_worker Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5959 [inline] __ocfs2_flush_truncate_log+0x824/0x1250 fs/ocfs2/alloc.c:6054 ocfs2_flush_truncate_log fs/ocfs2/alloc.c:6076 [inline] ocfs2_truncate_log_worker+0xa2/0x1b0 fs/ocfs2/alloc.c:6089 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x4d pfn:0x45e6f flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) raw: 04fff00000000000 ffffea0001179b88 ffffea0001179c08 0000000000000000 raw: 000000000000004d 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 5109, tgid 5109 (syz-executor412), ts 88738057363, free_ts 88913146991 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 folio_alloc_mpol_noprof+0x36/0x50 mm/mempolicy.c:2283 shmem_alloc_folio mm/shmem.c:1774 [inline] shmem_alloc_and_add_folio+0x49b/0x13d0 mm/shmem.c:1813 shmem_get_folio_gfp+0x5a9/0x20a0 mm/shmem.c:2335 shmem_get_folio mm/shmem.c:2441 [inline] shmem_write_begin+0x17e/0x460 mm/shmem.c:3046 generic_perform_write+0x344/0x6d0 mm/filemap.c:4050 shmem_file_write_iter+0xf9/0x120 mm/shmem.c:3221 new_sync_write fs/read_write.c:590 [inline] vfs_write+0xa6d/0xc90 fs/read_write.c:683 ksys_write+0x183/0x2b0 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 5109 tgid 5109 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_folios+0xf12/0x18d0 mm/page_alloc.c:2686 folios_put_refs+0x76c/0x860 mm/swap.c:1007 folio_batch_release include/linux/pagevec.h:101 [inline] shmem_undo_range+0x64c/0x1cf0 mm/shmem.c:1032 shmem_truncate_range mm/shmem.c:1144 [inline] shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1272 evict+0x4e8/0x9b0 fs/inode.c:723 __dentry_kill+0x20d/0x630 fs/dcache.c:615 dput+0x19f/0x2b0 fs/dcache.c:857 __fput+0x5d2/0x880 fs/file_table.c:439 __do_sys_close fs/open.c:1565 [inline] __se_sys_close fs/open.c:1550 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1550 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888045e6f980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888045e6fa00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888045e6fa80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888045e6fb00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888045e6fb80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/09/24 20:38 | upstream | abf2050f51fd | 5643e0e9 | .config | console log | report | syz / log | C | [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] | ci-snapshot-upstream-root | KASAN: use-after-free Read in __ocfs2_flush_truncate_log | |
2024/10/04 04:24 | upstream | 7ec462100ef9 | d7906eff | .config | console log | report | syz / log | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-upstream-fs | KASAN: slab-use-after-free Read in __ocfs2_flush_truncate_log | ||
2024/10/01 04:58 | upstream | e32cde8d2bd7 | bbd4e0a4 | .config | console log | report | syz / log | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-upstream-fs | KASAN: slab-use-after-free Read in __ocfs2_flush_truncate_log |