program: r0 = perf_event_open(&(0x7f00000004c0)={0x2, 0x80, 0x80, 0x0, 0x0, 0x0, 0x0, 0x4e93, 0x18445, 0x9, 0x0, 0x1, 0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x1, 0x0, 0x1, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x1, 0x1, 0x1, 0x1, 0x1, 0x0, 0x1, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x1, 0x2, @perf_bp={0x0, 0x5}, 0x8080, 0x4, 0x80000000, 0x2, 0x400000a5, 0x0, 0x8, 0x0, 0x0, 0x0, 0x3}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x3) ioctl$PERF_EVENT_IOC_SET_BPF(0xffffffffffffffff, 0x40042408, 0xffffffffffffffff) r1 = syz_mount_image$f2fs(&(0x7f0000000140), &(0x7f0000001380)='./file1\x00', 0x0, &(0x7f0000000280)=ANY=[@ANYBLOB="636865636b706f696e743d64697361626c652c6261636b67726f756e645f67633d73796e632c61636c2c616c6c6f635f6d6f64653d72657573652c696e6c696e655f78617474722c6e6f666c7573685f6d657267652c6d6f64653d6c66732c6e6f757365725f78617474722c636865636b706f696e743d64697361626c652c757365725f78617474722c6673796e635f6d6f64653d7374726963742c6167655f657874656e745f63616368652c646973636172642c6e6f696e6c696e655f64656e7472792c008bfb3c1e4b1b12ae77c937da8858"], 0x1, 0x5505, &(0x7f0000002480)="$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ioctl$PERF_EVENT_IOC_SET_FILTER(r0, 0x40082406, 0x0) r2 = bpf$PROG_LOAD(0x5, &(0x7f0000000440)={0x5, 0x3, &(0x7f00000000c0)=ANY=[@ANYBLOB="1800000000000000000000000000000095"], &(0x7f0000000200)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x4, '\x00', 0x0, @fallback=0x2a, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94) ioctl$BTRFS_IOC_BALANCE_V2(0xffffffffffffffff, 0xc4009420, &(0x7f0000000540)={0x1, 0x6, {0x8, @struct={0x9, 0x10}, 0x0, 0x9, 0x1742bb0a, 0xab, 0x3, 0x7, 0x82, @struct={0xfffffffe, 0x5}, 0x9d1c, 0x2, [0x1, 0x2, 0xf5, 0xe, 0xd5, 0xfffffffffffff800]}, {0x8, @usage=0xfffffffffffffa26, 0x0, 0x8, 0xc, 0xe0, 0x81, 0x0, 0x2, @usage=0x4, 0x0, 0x5, [0x4, 0x59, 0x1001, 0x4, 0x92b, 0x7]}, {0x8, @usage=0x4, 0x0, 0x8000, 0x7ff, 0x0, 0x8d9, 0x8, 0x4, @struct={0x1}, 0xc, 0x401, [0x8, 0x8, 0xfffffffffffffffd, 0x8, 0x4, 0x5]}, {0x5, 0x1ff, 0x5}}) ioctl$BTRFS_IOC_DEV_INFO(r0, 0xd000941e, &(0x7f00000013c0)={r3, "a8469f74651200ddc0d1216171569ff3"}) ioctl$PERF_EVENT_IOC_SET_BPF(r0, 0x40042408, r2) syz_clone(0x18e1400, 0x0, 0x0, 0x0, 0x0, 0x0) close(0x3) r4 = openat(0xffffffffffffff9c, &(0x7f0000000040)='file0\x00', 0x42, 0x1ff) r5 = openat$vnet(0xffffffffffffff9c, &(0x7f00000000c0), 0x2, 0x0) ioctl$VHOST_NET_SET_BACKEND(r5, 0x4008af30, &(0x7f0000000580)={0x1}) ftruncate(r4, 0xf4240) clock_gettime(0xa, 0x0) mkdir(&(0x7f0000000140)='./config\x00', 0x1ff) mount(0x0, &(0x7f0000000180)='./config\x00', &(0x7f00000001c0)='configfs\x00', 0x0, 0x0) ioctl$BTRFS_IOC_SEND(r1, 0x40489426, &(0x7f00000003c0)={{r1}, 0x3, &(0x7f0000000000)=[0x7, 0x3, 0x0], 0x10001, 0x4}) mkdir(&(0x7f0000000200)='./config/usb_gadget/g1\x00', 0x1bd) mkdir(&(0x7f0000000280)='./config/usb_gadget/g1/functions/mass_storage.0\x00', 0x1ff) r6 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./config/usb_gadget/g1/functions/mass_storage.0/lun.0/file\x00', 0x2, 0x0) write(r6, &(0x7f0000000380)='file0', 0x5) [ 93.344919][ T1371] cfg80211: failed to load regulatory.db [ 93.388065][ T5286] Bluetooth: hci0: command tx timeout [ 93.736345][ T5325] loop0: detected capacity change from 0 to 40427 [ 93.772171][ T5325] F2FS-fs (loop0): invalid crc value [ 93.983309][ T5325] F2FS-fs (loop0): f2fs_recover_fsync_data: recovery fsync data, check_only: 0 [ 94.003619][ T5325] F2FS-fs (loop0): f2fs_disable_checkpoint starts, unusable: 0 [ 94.006621][ T5325] F2FS-fs (loop0): f2fs_disable_checkpoint: call f2fs_write_checkpoint(), meta: 0, node: 0, data: 0 [ 94.017427][ T5325] F2FS-fs (loop0): Start checkpoint disabled! [ 94.028260][ T5325] F2FS-fs (loop0): f2fs_disable_checkpoint finishes, err:0 [ 94.032903][ T5325] F2FS-fs (loop0): Mounted with checkpoint version = 48b305e6 [ 94.138920][ T5325] Mass Storage Function, version: 2009/09/11 [ 94.146210][ T5325] LUN: removable file: (no medium) [ 94.165051][ T24] audit: type=1800 audit(1786089992.365:2): pid=5324 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="file" dev="configfs" ino=4258 res=0 errno=0 [ 94.175504][ T5324] [ 94.176565][ T5324] ====================================================== [ 94.179523][ T5324] WARNING: possible circular locking dependency detected [ 94.182386][ T5324] syzkaller #0 Not tainted [ 94.184256][ T5324] ------------------------------------------------------ [ 94.187141][ T5324] syz.0.0/5324 is trying to acquire lock: [ 94.189551][ T5324] ffff88800e7e8cc0 (&ima_iint_mutex_key[depth]){+.+.}-{4:4}, at: process_measurement+0x7d0/0x1c10 [ 94.193949][ T5324] [ 94.193949][ T5324] but task is already holding lock: [ 94.197043][ T5324] ffff888050e69920 (&common->filesem){++++}-{4:4}, at: fsg_store_file+0x163/0x400 [ 94.200805][ T5324] [ 94.200805][ T5324] which lock already depends on the new lock. [ 94.200805][ T5324] [ 94.204916][ T5324] [ 94.204916][ T5324] the existing dependency chain (in reverse order) is: [ 94.208485][ T5324] [ 94.208485][ T5324] -> #3 (&common->filesem){++++}-{4:4}: [ 94.211586][ T5324] down_read+0x4a/0x330 [ 94.213425][ T5324] fsg_show_file+0x2d/0x140 [ 94.215643][ T5324] configfs_read_iter+0x2b7/0x620 [ 94.217962][ T5324] __kernel_read+0x4ca/0x960 [ 94.220167][ T5324] integrity_kernel_read+0x89/0xd0 [ 94.222693][ T5324] ima_calc_file_hash+0x451/0x890 [ 94.225099][ T5324] ima_collect_measurement+0x51b/0xa00 [ 94.227740][ T5324] process_measurement+0x1272/0x1c10 [ 94.230219][ T5324] ima_file_check+0xe1/0x130 [ 94.232447][ T5324] security_file_post_open+0xb3/0x260 [ 94.235455][ T5324] path_openat+0x2e90/0x3830 [ 94.237605][ T5324] do_file_open+0x23e/0x4a0 [ 94.239736][ T5324] do_sys_openat2+0x115/0x200 [ 94.241996][ T5324] __x64_sys_openat+0x138/0x170 [ 94.244238][ T5324] do_syscall_64+0x174/0x580 [ 94.246498][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.249608][ T5324] [ 94.249608][ T5324] -> #2 (&p->frag_sem){.+.+}-{4:4}: [ 94.252654][ T5324] down_read+0x4a/0x330 [ 94.254777][ T5324] configfs_read_iter+0x1cc/0x620 [ 94.257088][ T5324] __kernel_read+0x4ca/0x960 [ 94.259311][ T5324] integrity_kernel_read+0x89/0xd0 [ 94.261746][ T5324] ima_calc_file_hash+0x451/0x890 [ 94.263914][ T5324] ima_collect_measurement+0x51b/0xa00 [ 94.266406][ T5324] process_measurement+0x1272/0x1c10 [ 94.268798][ T5324] ima_file_check+0xe1/0x130 [ 94.270881][ T5324] security_file_post_open+0xb3/0x260 [ 94.273352][ T5324] path_openat+0x2e90/0x3830 [ 94.275499][ T5324] do_file_open+0x23e/0x4a0 [ 94.277502][ T5324] do_sys_openat2+0x115/0x200 [ 94.279559][ T5324] __x64_sys_openat+0x138/0x170 [ 94.281826][ T5324] do_syscall_64+0x174/0x580 [ 94.283905][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.286633][ T5324] [ 94.286633][ T5324] -> #1 (&buffer->mutex){+.+.}-{4:4}: [ 94.289747][ T5324] __mutex_lock+0x19d/0x1550 [ 94.291846][ T5324] configfs_read_iter+0x70/0x620 [ 94.294042][ T5324] __kernel_read+0x4ca/0x960 [ 94.296144][ T5324] integrity_kernel_read+0x89/0xd0 [ 94.298421][ T5324] ima_calc_file_hash+0x451/0x890 [ 94.300758][ T5324] ima_collect_measurement+0x51b/0xa00 [ 94.303166][ T5324] process_measurement+0x1272/0x1c10 [ 94.305634][ T5324] ima_file_check+0xe1/0x130 [ 94.307718][ T5324] security_file_post_open+0xb3/0x260 [ 94.310106][ T5324] path_openat+0x2e90/0x3830 [ 94.312218][ T5324] do_file_open+0x23e/0x4a0 [ 94.314326][ T5324] do_sys_openat2+0x115/0x200 [ 94.316450][ T5324] __x64_sys_openat+0x138/0x170 [ 94.318818][ T5324] do_syscall_64+0x174/0x580 [ 94.320877][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.323484][ T5324] [ 94.323484][ T5324] -> #0 (&ima_iint_mutex_key[depth]){+.+.}-{4:4}: [ 94.327118][ T5324] __lock_acquire+0x1520/0x2cf0 [ 94.329276][ T5324] lock_acquire+0x106/0x350 [ 94.331387][ T5324] __mutex_lock+0x19d/0x1550 [ 94.333532][ T5324] process_measurement+0x7d0/0x1c10 [ 94.335903][ T5324] ima_file_check+0xe1/0x130 [ 94.338030][ T5324] security_file_post_open+0xb3/0x260 [ 94.340435][ T5324] path_openat+0x2e90/0x3830 [ 94.342464][ T5324] do_file_open+0x23e/0x4a0 [ 94.344519][ T5324] filp_open+0x16d/0x1d0 [ 94.346422][ T5324] fsg_lun_open+0x6c/0xdf0 [ 94.348517][ T5324] fsg_store_file+0x19e/0x400 [ 94.350694][ T5324] configfs_write_iter+0x337/0x430 [ 94.353021][ T5324] vfs_write+0x612/0xba0 [ 94.355093][ T5324] ksys_write+0x150/0x270 [ 94.357120][ T5324] do_syscall_64+0x174/0x580 [ 94.359197][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.361825][ T5324] [ 94.361825][ T5324] other info that might help us debug this: [ 94.361825][ T5324] [ 94.365836][ T5324] Chain exists of: [ 94.365836][ T5324] &ima_iint_mutex_key[depth] --> &p->frag_sem --> &common->filesem [ 94.365836][ T5324] [ 94.371338][ T5324] Possible unsafe locking scenario: [ 94.371338][ T5324] [ 94.374427][ T5324] CPU0 CPU1 [ 94.376574][ T5324] ---- ---- [ 94.378737][ T5324] lock(&common->filesem); [ 94.380690][ T5324] lock(&p->frag_sem); [ 94.383405][ T5324] lock(&common->filesem); [ 94.386307][ T5324] lock(&ima_iint_mutex_key[depth]); [ 94.388488][ T5324] [ 94.388488][ T5324] *** DEADLOCK *** [ 94.388488][ T5324] [ 94.391635][ T5324] 5 locks held by syz.0.0/5324: [ 94.393611][ T5324] #0: ffff888043db6b70 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320 [ 94.397293][ T5324] #1: ffff8880002d6450 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0 [ 94.400993][ T5324] #2: ffff888036813a80 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x7e/0x430 [ 94.405021][ T5324] #3: ffff888036d13d70 (&p->frag_sem){.+.+}-{4:4}, at: configfs_write_iter+0x238/0x430 [ 94.408886][ T5324] #4: ffff888050e69920 (&common->filesem){++++}-{4:4}, at: fsg_store_file+0x163/0x400 [ 94.412704][ T5324] [ 94.412704][ T5324] stack backtrace: [ 94.415143][ T5324] CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 94.415158][ T5324] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 94.415166][ T5324] Call Trace: [ 94.415173][ T5324] [ 94.415179][ T5324] dump_stack_lvl+0xe8/0x150 [ 94.415198][ T5324] print_circular_bug+0x2e1/0x300 [ 94.415212][ T5324] check_noncircular+0x12e/0x150 [ 94.415223][ T5324] __lock_acquire+0x1520/0x2cf0 [ 94.415238][ T5324] ? __pfx_stack_trace_save+0x10/0x10 [ 94.415252][ T5324] ? check_path+0x21/0x40 [ 94.415260][ T5324] ? check_noncircular+0xda/0x150 [ 94.415270][ T5324] ? add_lock_to_list+0xc7/0x100 [ 94.415281][ T5324] ? process_measurement+0x7d0/0x1c10 [ 94.415293][ T5324] lock_acquire+0x106/0x350 [ 94.415306][ T5324] ? process_measurement+0x7d0/0x1c10 [ 94.415320][ T5324] __mutex_lock+0x19d/0x1550 [ 94.415332][ T5324] ? process_measurement+0x7d0/0x1c10 [ 94.415345][ T5324] ? process_measurement+0x443/0x1c10 [ 94.415359][ T5324] ? process_measurement+0x443/0x1c10 [ 94.415372][ T5324] ? process_measurement+0x7d0/0x1c10 [ 94.415385][ T5324] ? __pfx___mutex_lock+0x10/0x10 [ 94.415399][ T5324] ? ima_inode_get+0xcb/0x4d0 [ 94.415410][ T5324] process_measurement+0x7d0/0x1c10 [ 94.415422][ T5324] ? check_path+0x21/0x40 [ 94.415432][ T5324] ? __pfx_process_measurement+0x10/0x10 [ 94.415451][ T5324] ? __pfx___up_read+0x10/0x10 [ 94.415468][ T5324] ? finish_preallocate_blocks+0x79/0x300 [ 94.415489][ T5324] ima_file_check+0xe1/0x130 [ 94.415502][ T5324] ? do_dentry_open+0xd21/0x1380 [ 94.415515][ T5324] ? __pfx_ima_file_check+0x10/0x10 [ 94.415531][ T5324] security_file_post_open+0xb3/0x260 [ 94.415546][ T5324] path_openat+0x2e90/0x3830 [ 94.415560][ T5324] ? kasan_save_track+0x3e/0x80 [ 94.415571][ T5324] ? filp_open+0x87/0x1d0 [ 94.415581][ T5324] ? configfs_write_iter+0x337/0x430 [ 94.415593][ T5324] ? vfs_write+0x612/0xba0 [ 94.415606][ T5324] ? ksys_write+0x150/0x270 [ 94.415621][ T5324] do_file_open+0x23e/0x4a0 [ 94.415635][ T5324] ? __pfx_do_file_open+0x10/0x10 [ 94.415653][ T5324] ? do_getname_kernel+0x54/0x230 [ 94.415662][ T5324] ? do_getname_kernel+0x54/0x230 [ 94.415672][ T5324] ? do_getname_kernel+0x97/0x230 [ 94.415682][ T5324] ? __asan_memcpy+0x40/0x70 [ 94.415694][ T5324] filp_open+0x16d/0x1d0 [ 94.415705][ T5324] ? __pfx_filp_open+0x10/0x10 [ 94.415719][ T5324] fsg_lun_open+0x6c/0xdf0 [ 94.415735][ T5324] fsg_store_file+0x19e/0x400 [ 94.415747][ T5324] ? __pfx_fsg_lun_opts_file_store+0x10/0x10 [ 94.415760][ T5324] configfs_write_iter+0x337/0x430 [ 94.415773][ T5324] vfs_write+0x612/0xba0 [ 94.415789][ T5324] ? __pfx_vfs_write+0x10/0x10 [ 94.415803][ T5324] ? __fget_files+0x2a/0x420 [ 94.415817][ T5324] ksys_write+0x150/0x270 [ 94.415831][ T5324] ? __pfx_ksys_write+0x10/0x10 [ 94.415847][ T5324] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.415857][ T5324] do_syscall_64+0x174/0x580 [ 94.415870][ T5324] ? trace_irq_disable+0x3b/0x140 [ 94.415882][ T5324] ? clear_bhb_loop+0x70/0xc0 [ 94.415891][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.415900][ T5324] RIP: 0033:0x7fc2caf9e0d9 [ 94.415911][ T5324] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 [ 94.415919][ T5324] RSP: 002b:00007fc2cbd85fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 94.415930][ T5324] RAX: ffffffffffffffda RBX: 00007fc2cb225fa0 RCX: 00007fc2caf9e0d9 [ 94.415939][ T5324] RDX: 0000000000000005 RSI: 0000200000000380 RDI: 0000000000000007 [ 94.415946][ T5324] RBP: 00007fc2cb035024 R08: 0000000000000000 R09: 0000000000000000 [ 94.415953][ T5324] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 94.415959][ T5324] R13: 00007fc2cb226038 R14: 00007fc2cb225fa0 R15: 00007ffcc70322c8 [ 94.415970][ T5324]