------------[ cut here ]------------ WARNING: CPU: 0 PID: 15037 at kernel/cgroup/cgroup.c:1395 cset_cgroup_from_root+0x1a8/0x2a0 kernel/cgroup/cgroup.c:1395 Modules linked in: CPU: 0 PID: 15037 Comm: syz-executor.4 Not tainted 5.10.226 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:cset_cgroup_from_root+0x1a8/0x2a0 kernel/cgroup/cgroup.c:1395 Code: 50 08 00 be ff ff ff ff 48 c7 c7 08 3a 02 85 e8 6e 9e ad 02 31 ff 41 89 c4 89 c6 e8 d2 49 08 00 45 85 e4 75 07 e8 78 50 08 00 <0f> 0b e8 71 50 08 00 48 89 ea 83 e5 07 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffff88805345f9b8 EFLAGS: 00010012 RAX: 0000000000000a8d RBX: ffff88800eb90c00 RCX: ffffc90007234000 RDX: 0000000000040000 RSI: ffffffff81384ec8 RDI: 0000000000000005 RBP: ffffffff85676efc R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88800fd98000 R14: ffff888048813c00 R15: 0000000000000000 FS: 00007fd2803b8700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd2803b7ff8 CR3: 000000004c2aa000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000dddd06aa Call Trace: cgroup_path_ns_locked+0x6c/0x110 kernel/cgroup/cgroup.c:2261 proc_cpuset_show+0x19a/0x510 kernel/cgroup/cpuset.c:3732 proc_single_show+0x121/0x1f0 fs/proc/base.c:775 seq_read_iter+0x510/0x12b0 fs/seq_file.c:230 seq_read+0x3dd/0x5b0 fs/seq_file.c:162 do_loop_readv_writev fs/read_write.c:761 [inline] do_loop_readv_writev fs/read_write.c:748 [inline] do_iter_read+0x4fa/0x760 fs/read_write.c:803 vfs_readv+0xe5/0x160 fs/read_write.c:921 do_readv+0x139/0x300 fs/read_write.c:958 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 audit: type=1326 audit(1728713542.251:418): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15023 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fec41dbfb19 code=0x7ffc0000 RIP: 0033:0x7fd282e42b19 audit: type=1326 audit(1728713542.252:419): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15023 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fec41dbfb19 code=0x7ffc0000 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd2803b8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007fd282f55f60 RCX: 00007fd282e42b19 RDX: 0000000000000001 RSI: 0000000020001600 RDI: 0000000000000006 RBP: 00007fd282e9cf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe22c8316f R14: 00007fd2803b8300 R15: 0000000000022000 irq event stamp: 832 hardirqs last enabled at (831): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (831): [] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (832): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (832): [] _raw_spin_lock_irq+0x3e/0x40 kernel/locking/spinlock.c:167 softirqs last enabled at (610): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (605): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace 5b4e969d08e66cb9 ]--- audit: type=1326 audit(1728713542.326:420): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15023 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=67 compat=0 ip=0x7fec41dbfb19 code=0x7ffc0000 audit: type=1326 audit(1728713542.327:421): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15023 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fec41dbfb19 code=0x7ffc0000 audit: type=1326 audit(1728713542.327:422): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15023 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7fec41dbfb19 code=0x7ffc0000 audit: type=1326 audit(1728713542.339:423): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15023 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fec41dbfb19 code=0x7ffc0000 audit: type=1326 audit(1728713542.339:424): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15023 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=29 compat=0 ip=0x7fec41dbfb19 code=0x7ffc0000 audit: type=1326 audit(1728713542.340:425): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15023 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fec41dbfb19 code=0x7ffc0000 audit: type=1326 audit(1728713542.340:426): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=15023 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fec41dbfb19 code=0x7ffc0000 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) sr 1:0:0:0: [sr0] tag#0 unaligned transfer print_req_error: 38 callbacks suppressed blk_update_request: I/O error, dev sr0, sector 2096896 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_update_request: I/O error, dev sr0, sector 2096897 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 blk_update_request: I/O error, dev loop4, sector 2096897 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 buffer_io_error: 14 callbacks suppressed Buffer I/O error on dev loop4, logical block 2096897, async page read blk_update_request: I/O error, dev loop4, sector 2096896 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop4, logical block 2096896, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_update_request: I/O error, dev sr0, sector 2096898 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 blk_update_request: I/O error, dev loop4, sector 2096898 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev loop4, logical block 2096898, async page read blk_update_request: I/O error, dev sr0, sector 2096899 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 blk_update_request: I/O error, dev loop4, sector 2096899 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev loop4, logical block 2096899, async page read blk_update_request: I/O error, dev sr0, sector 2096900 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 blk_update_request: I/O error, dev loop4, sector 2096900 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev loop4, logical block 2096900, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev loop4, logical block 2096901, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev loop4, logical block 2096902, async page read Buffer I/O error on dev loop4, logical block 2096903, async page read ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff c3 inc %ebx 2: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 9: 00 00 00 c: 0f 1f 40 00 nopl 0x0(%rax) 10: 48 89 f8 mov %rdi,%rax 13: 48 89 f7 mov %rsi,%rdi 16: 48 89 d6 mov %rdx,%rsi 19: 48 89 ca mov %rcx,%rdx 1c: 4d 89 c2 mov %r8,%r10 1f: 4d 89 c8 mov %r9,%r8 22: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 27: 0f 05 syscall * 29: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 2f: 73 01 jae 0x32 31: c3 retq 32: 48 c7 c1 bc ff ff ff mov $0xffffffffffffffbc,%rcx 39: f7 d8 neg %eax 3b: 64 89 01 mov %eax,%fs:(%rcx) 3e: 48 rex.W