syzbot |
sign-in | mailing list | source | docs |
| 🐞 Open [872] ≡ Subsystems 🐞 Fixed [4875] 🐞 Invalid [11643] ⬇ Missing Backports [68] 📈 Kernel Health 📈 Bug Lifetimes 📈 Fuzzing 📈 Crashes | 💬 Send us feedback |
| Title | Replies (including bot) | Last reply |
|---|---|---|
| [PATCH AUTOSEL 6.4 05/16] fs/sysv: Null check to prevent null-ptr-deref bug | 1 (1) | 2023/07/02 19:38 |
| [PATCH v3] fs/sysv: Null check to prevent null-ptr-deref bug | 6 (6) | 2023/06/01 07:55 |
| [PATCH] Null check to prevent null-ptr-deref bug | 2 (2) | 2023/05/28 17:52 |
| [syzbot] [fs?] KASAN: null-ptr-deref Write in get_block (2) | 0 (1) | 2023/05/22 22:36 |
| Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|
| linux-6.1 | KASAN: null-ptr-deref Write in get_block origin:upstream missing-backport | C | done | 4 | 120d | 166d | 3/3 | fixed on 2023/10/02 12:03 | |
| upstream | KASAN: null-ptr-deref Write in get_block fs | C | done | 101 | 1237d | 1351d | 17/25 | fixed on 2020/09/16 22:51 | |
| linux-5.15 | KASAN: null-ptr-deref Write in get_block origin:upstream missing-backport | C | done | 2 | 122d | 168d | 3/3 | fixed on 2023/10/03 00:08 | |
| linux-4.14 | BUG: unable to handle kernel NULL pointer dereference in get_block (2) | C | 1 | 275d | 358d | 0/1 | upstream: reported C repro on 2022/12/09 08:52 | ||
| upstream | KASAN: slab-out-of-bounds Read in get_block (2) fs | 1 | 327d | 327d | 0/25 | auto-obsoleted due to no activity on 2023/05/09 01:15 |
memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4998 'syz-executor295' loop0: detected capacity change from 0 to 128 VFS: Found a Xenix FS (block size = 512) on device loop0 sysv_free_block: trying to free block not in datazone ================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: null-ptr-deref in test_and_set_bit_lock include/asm-generic/bitops/instrumented-lock.h:57 [inline] BUG: KASAN: null-ptr-deref in trylock_buffer include/linux/buffer_head.h:399 [inline] BUG: KASAN: null-ptr-deref in lock_buffer include/linux/buffer_head.h:405 [inline] BUG: KASAN: null-ptr-deref in alloc_branch fs/sysv/itree.c:148 [inline] BUG: KASAN: null-ptr-deref in get_block+0x3e6/0x1580 fs/sysv/itree.c:251 Write of size 8 at addr 0000000000000000 by task syz-executor295/4998 CPU: 0 PID: 4998 Comm: syz-executor295 Not tainted 6.4.0-rc7-syzkaller-00194-g8a28a0b6f1a1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_report mm/kasan/report.c:465 [inline] kasan_report+0xec/0x130 mm/kasan/report.c:572 check_region_inline mm/kasan/generic.c:181 [inline] kasan_check_range+0x141/0x190 mm/kasan/generic.c:187 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] test_and_set_bit_lock include/asm-generic/bitops/instrumented-lock.h:57 [inline] trylock_buffer include/linux/buffer_head.h:399 [inline] lock_buffer include/linux/buffer_head.h:405 [inline] alloc_branch fs/sysv/itree.c:148 [inline] get_block+0x3e6/0x1580 fs/sysv/itree.c:251 __block_write_begin_int+0x3bd/0x14b0 fs/buffer.c:2064 __block_write_begin fs/buffer.c:2114 [inline] block_write_begin+0xb9/0x4d0 fs/buffer.c:2175 sysv_write_begin+0x31/0xd0 fs/sysv/itree.c:485 generic_perform_write+0x256/0x570 mm/filemap.c:3929 __generic_file_write_iter+0x2ae/0x500 mm/filemap.c:4057 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4089 call_write_iter include/linux/fs.h:1868 [inline] do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735 do_iter_write+0x185/0x7e0 fs/read_write.c:860 vfs_writev+0x1aa/0x670 fs/read_write.c:933 do_pwritev fs/read_write.c:1030 [inline] __do_sys_pwritev fs/read_write.c:1077 [inline] __se_sys_pwritev fs/read_write.c:1072 [inline] __x64_sys_pwritev+0x22f/0x310 fs/read_write.c:1072 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 RIP: 0033:0x7f3830c5cb19 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd8b0f5988 EFLAGS: 00000246 ORIG_RAX: 0000000000000128 RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f3830c5cb19 RDX: 0000000000000005 RSI: 0000000020000480 RDI: 0000000000000004 RBP: 00007f3830c1c150 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000007fff R11: 0000000000000246 R12: 00007f3830c1c1e0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023/06/23 22:28 | upstream | 8a28a0b6f1a1 | 09ffe269 | .config | strace log | report | syz | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci-upstream-kasan-gce-root | KASAN: null-ptr-deref Write in get_block | |
| 2023/05/18 22:41 | upstream | 4d6d4c7f541d | 3bb7af1d | .config | strace log | report | syz | C | [disk image] [vmlinux] [kernel image] [mounted in repro] | ci2-upstream-fs | KASAN: null-ptr-deref Write in get_block | |
| 2023/06/25 16:02 | upstream | a92b7d26c743 | 09ffe269 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | KASAN: null-ptr-deref Write in get_block | ||
| 2023/06/25 15:58 | upstream | a92b7d26c743 | 79782afc | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream | KASAN: null-ptr-deref Write in get_block | ||
| 2023/06/25 15:58 | upstream | a92b7d26c743 | 09ffe269 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | KASAN: null-ptr-deref Write in get_block | ||
| 2023/06/25 15:44 | upstream | a92b7d26c743 | 79782afc | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | KASAN: null-ptr-deref Write in get_block | ||
| 2023/06/25 15:35 | upstream | a92b7d26c743 | 09ffe269 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-smack-root | KASAN: null-ptr-deref Write in get_block | ||
| 2023/06/25 15:14 | upstream | a92b7d26c743 | 79782afc | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | KASAN: null-ptr-deref Write in get_block | ||
| 2023/06/15 13:09 | upstream | b6dad5178cea | 90d4044e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | KASAN: null-ptr-deref Write in get_block | ||
| 2023/05/18 22:22 | upstream | 4d6d4c7f541d | 3bb7af1d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-fs | KASAN: null-ptr-deref Write in get_block | ||
| 2023/06/25 15:53 | upstream | a92b7d26c743 | 79782afc | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream-386 | KASAN: null-ptr-deref Write in get_block |