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================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:72 [inline] BUG: KASAN: null-ptr-deref in atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] BUG: KASAN: null-ptr-deref in buffer_busy fs/buffer.c:2784 [inline] BUG: KASAN: null-ptr-deref in drop_buffers+0x65/0x6a0 fs/buffer.c:2796 Read of size 4 at addr 0000000000000060 by task kswapd0/83 CPU: 0 PID: 83 Comm: kswapd0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: <TASK> dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 kasan_report+0x10b/0x140 mm/kasan/report.c:524 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x235/0x290 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:72 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] buffer_busy fs/buffer.c:2784 [inline] drop_buffers+0x65/0x6a0 fs/buffer.c:2796 try_to_free_buffers+0x230/0x560 fs/buffer.c:2830 shrink_folio_list+0x2127/0x7aa0 mm/vmscan.c:2003 evict_folios+0xa80/0x22a0 mm/vmscan.c:5046 lru_gen_shrink_lruvec mm/vmscan.c:5229 [inline] shrink_lruvec+0xc90/0x3d50 mm/vmscan.c:5924 shrink_node_memcgs mm/vmscan.c:6145 [inline] shrink_node+0x680/0x28d0 mm/vmscan.c:6176 kswapd_shrink_node mm/vmscan.c:6968 [inline] balance_pgdat mm/vmscan.c:7158 [inline] kswapd+0x1c3e/0x3360 mm/vmscan.c:7418 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> ================================================================== Kernel panic - not syncing: KASAN: panic_on_warn set ... CPU: 0 PID: 83 Comm: kswapd0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: <TASK> dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 panic+0x2e5/0x730 kernel/panic.c:339 check_panic_on_warn+0x80/0xa0 kernel/panic.c:235 end_report+0x66/0x110 mm/kasan/report.c:200 kasan_report+0x118/0x140 mm/kasan/report.c:526 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x235/0x290 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:72 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] buffer_busy fs/buffer.c:2784 [inline] drop_buffers+0x65/0x6a0 fs/buffer.c:2796 try_to_free_buffers+0x230/0x560 fs/buffer.c:2830 shrink_folio_list+0x2127/0x7aa0 mm/vmscan.c:2003 evict_folios+0xa80/0x22a0 mm/vmscan.c:5046 lru_gen_shrink_lruvec mm/vmscan.c:5229 [inline] shrink_lruvec+0xc90/0x3d50 mm/vmscan.c:5924 shrink_node_memcgs mm/vmscan.c:6145 [inline] shrink_node+0x680/0x28d0 mm/vmscan.c:6176 kswapd_shrink_node mm/vmscan.c:6968 [inline] balance_pgdat mm/vmscan.c:7158 [inline] kswapd+0x1c3e/0x3360 mm/vmscan.c:7418 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> Kernel Offset: disabled
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/06/03 12:35 | linux-6.1.y | 228da13e907e | 234057e5 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | KASAN: null-ptr-deref Read in drop_buffers |