syz-executor.2 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000 CPU: 0 PID: 6606 Comm: syz-executor.2 Not tainted 6.0.0-rc1-next-20220818-syzkaller #0 BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1521 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 6606, name: syz-executor.2 preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 5 locks held by syz-executor.2/6606: #0: ffff8880227fa0e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe3/0x100 fs/file.c:1036 #1: ffff8880779e6460 (sb_writers#10){.+.+}-{0:0}, at: ksys_write+0x127/0x250 fs/read_write.c:631 #2: ffff88807df0f488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x28c/0x610 fs/kernfs/file.c:345 #3: ffff888077db8cb8 (kn->active#215){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2b0/0x610 fs/kernfs/file.c:346 #4: ffffffff8c0780a8 (oom_lock){+.+.}-{3:3}, at: mem_cgroup_out_of_memory+0x8d/0x270 mm/memcontrol.c:1642 irq event stamp: 5448 hardirqs last enabled at (5447): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1352 [inline] hardirqs last enabled at (5447): [] finish_lock_switch kernel/sched/core.c:4956 [inline] hardirqs last enabled at (5447): [] finish_task_switch.isra.0+0x2b5/0xc70 kernel/sched/core.c:5074 hardirqs last disabled at (5448): [] dump_stack_lvl+0x2e/0x134 lib/dump_stack.c:139 softirqs last enabled at (5440): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last enabled at (5440): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 softirqs last disabled at (5413): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (5413): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 CPU: 0 PID: 6606 Comm: syz-executor.2 Not tainted 6.0.0-rc1-next-20220818-syzkaller #0 syz-executor.2[6606] cmdline: /root/syz-executor.2 exec Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:122 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:140 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9896 down_read_killable+0x75/0x490 kernel/locking/rwsem.c:1521 mmap_read_lock_killable include/linux/mmap_lock.h:126 [inline] __access_remote_vm+0xac/0x6f0 mm/memory.c:5461 get_mm_cmdline.part.0+0x217/0x620 fs/proc/base.c:299 get_mm_cmdline fs/proc/base.c:367 [inline] get_task_cmdline_kernel+0x1d9/0x220 fs/proc/base.c:367 dump_stack_print_cmdline.part.0+0x82/0x150 lib/dump_stack.c:61 dump_stack_print_cmdline lib/dump_stack.c:89 [inline] dump_stack_print_info+0x185/0x190 lib/dump_stack.c:97 __dump_stack lib/dump_stack.c:121 [inline] dump_stack_lvl+0xc1/0x134 lib/dump_stack.c:140 dump_header+0x10b/0x7f9 mm/oom_kill.c:460 oom_kill_process.cold+0x10/0x15 mm/oom_kill.c:1036 out_of_memory+0x358/0x14a0 mm/oom_kill.c:1174 mem_cgroup_out_of_memory+0x206/0x270 mm/memcontrol.c:1652 memory_max_write+0x2f5/0x3c0 mm/memcontrol.c:6392 cgroup_file_write+0x1de/0x770 kernel/cgroup/cgroup.c:3930 kernfs_fop_write_iter+0x3f8/0x610 fs/kernfs/file.c:354 call_write_iter include/linux/fs.h:2188 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x9e9/0xdd0 fs/read_write.c:578 ksys_write+0x127/0x250 fs/read_write.c:631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f84f1489279 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f84f267f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f84f159bf80 RCX: 00007f84f1489279 RDX: 0000000000000012 RSI: 0000000020000080 RDI: 0000000000000006 RBP: 00007f84f14e3189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdfe0de08f R14: 00007f84f267f300 R15: 0000000000022000 syz-executor.2[6606] cmdline: /root/syz-executor.2 exec Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:122 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:140 dump_header+0x10b/0x7f9 mm/oom_kill.c:460 oom_kill_process.cold+0x10/0x15 mm/oom_kill.c:1036 out_of_memory+0x358/0x14a0 mm/oom_kill.c:1174 mem_cgroup_out_of_memory+0x206/0x270 mm/memcontrol.c:1652 memory_max_write+0x2f5/0x3c0 mm/memcontrol.c:6392 cgroup_file_write+0x1de/0x770 kernel/cgroup/cgroup.c:3930 kernfs_fop_write_iter+0x3f8/0x610 fs/kernfs/file.c:354 call_write_iter include/linux/fs.h:2188 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x9e9/0xdd0 fs/read_write.c:578 ksys_write+0x127/0x250 fs/read_write.c:631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f84f1489279 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f84f267f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f84f159bf80 RCX: 00007f84f1489279 RDX: 0000000000000012 RSI: 0000000020000080 RDI: 0000000000000006 RBP: 00007f84f14e3189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdfe0de08f R14: 00007f84f267f300 R15: 0000000000022000 memory: usage 688kB, limit 0kB, failcnt 20 swap: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz1: anon 167936 file 208896 kernel 327680 kernel_stack 98304 pagetables 86016 percpu 0 sock 0 vmalloc 0 shmem 196608 zswap 0 zswapped 0 file_mapped 196608 file_dirty 12288 file_writeback 0 swapcached 0 anon_thp 0 file_thp 0 shmem_thp 0 inactive_anon 167936 active_anon 196608 inactive_file 8192 active_file 4096 unevictable 0 slab_reclaimable 19208 slab_unreclaimable 94680 slab 113888 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz2,mems_allowed=0-1,oom_memcg=/syz1,task_memcg=/syz1,task=syz-executor.1,pid=3639,uid=0 Memory cgroup out of memory: Killed process 3639 (syz-executor.1) total-vm:50536kB, anon-rss:396kB, file-rss:9072kB, shmem-rss:4kB, UID:0 pgtables:72kB oom_score_adj:0