program: bpf$MAP_CREATE(0x0, &(0x7f0000000000)=@base={0xa, 0x2, 0x42, 0x40, 0x42}, 0x48) sendto$inet(0xffffffffffffffff, &(0x7f00000000c0)="8689d46205a34100ff2bbe11a5ce7879edaf02afe39ead95913e9c4f8cf31440006769ebdf12cfacae8e8c03f5db079da7d9", 0x32, 0x0, 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1) pipe2$9p(&(0x7f00000001c0)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) write$P9_RVERSION(r1, &(0x7f0000000280)=ANY=[@ANYBLOB="1500000065ffff048000000800395032303030"], 0x15) r2 = dup(r1) write$FUSE_BMAP(r2, &(0x7f0000000100)={0x18}, 0x18) write$FUSE_NOTIFY_RETRIEVE(r2, &(0x7f00000000c0)={0x14c}, 0x137) mount$9p_fd(0x0, &(0x7f0000000000)='./file0\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX=r0, @ANYBLOB=',wfdno=', @ANYRESHEX=r2, @ANYBLOB=',cache=mmap']) chmod(&(0x7f0000000140)='./file0\x00', 0x0) r3 = creat(&(0x7f0000000300)='./file0\x00', 0x0) pwritev2(r3, &(0x7f0000000200)=[{&(0x7f0000000340)="01", 0x1}], 0x1, 0x8, 0x6, 0x0) write$FUSE_POLL(r3, &(0x7f0000000380)={0x18, 0xfffffffffffffff5, 0x0, {0x1}}, 0x18) bpf$MAP_CREATE(0x0, &(0x7f0000000000)=@base={0xa, 0x2, 0x42, 0x40, 0x42}, 0x48) (async) sendto$inet(0xffffffffffffffff, &(0x7f00000000c0)="8689d46205a34100ff2bbe11a5ce7879edaf02afe39ead95913e9c4f8cf31440006769ebdf12cfacae8e8c03f5db079da7d9", 0x32, 0x0, 0x0, 0x0) (async) openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1) (async) pipe2$9p(&(0x7f00000001c0), 0x0) (async) write$P9_RVERSION(r1, &(0x7f0000000280)=ANY=[@ANYBLOB="1500000065ffff048000000800395032303030"], 0x15) (async) dup(r1) (async) write$FUSE_BMAP(r2, &(0x7f0000000100)={0x18}, 0x18) (async) write$FUSE_NOTIFY_RETRIEVE(r2, &(0x7f00000000c0)={0x14c}, 0x137) (async) mount$9p_fd(0x0, &(0x7f0000000000)='./file0\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX=r0, @ANYBLOB=',wfdno=', @ANYRESHEX=r2, @ANYBLOB=',cache=mmap']) (async) chmod(&(0x7f0000000140)='./file0\x00', 0x0) (async) creat(&(0x7f0000000300)='./file0\x00', 0x0) (async) pwritev2(r3, &(0x7f0000000200)=[{&(0x7f0000000340)="01", 0x1}], 0x1, 0x8, 0x6, 0x0) (async) write$FUSE_POLL(r3, &(0x7f0000000380)={0x18, 0xfffffffffffffff5, 0x0, {0x1}}, 0x18) (async) [ 69.108879][ T5336] Bluetooth: hci0: command tx timeout [ 69.202126][ T5356] page: refcount:1 mapcount:0 mapping:ffff888042fd0220 index:0x0 pfn:0x4cd46 [ 69.205879][ T5356] memcg:ffff88801c688d00 [ 69.209108][ T5356] aops:v9fs_addr_operations ino:2 dentry name(?):"/" [ 69.212648][ T5356] flags: 0x4fff20000000020(lru|node=1|zone=1|lastcpupid=0x7ff) [ 69.216415][ T5356] raw: 04fff20000000020 ffff8880304709e0 ffff8880304709e0 ffff888042fd0220 [ 69.222330][ T5356] raw: 0000000000000000 0000000000000000 00000001ffffffff ffff88801c688d00 [ 69.225864][ T5356] page dumped because: VM_BUG_ON_FOLIO(!folio_test_locked(folio)) [ 69.229238][ T5356] page_owner tracks the page as allocated [ 69.232309][ T5356] page last allocated via order 0, migratetype Movable, gfp_mask 0x141cca(GFP_HIGHUSER_MOVABLE|__GFP_WRITE|__GFP_COMP), pid 5356, tgid 5355 (syz.0.0), ts 69190024771, free_ts 67490531093 [ 69.242663][ T5356] post_alloc_hook+0x240/0x2a0 [ 69.246830][ T5356] get_page_from_freelist+0x21e4/0x22c0 [ 69.249951][ T5356] __alloc_frozen_pages_noprof+0x181/0x370 [ 69.252512][ T5356] alloc_pages_mpol+0x232/0x4a0 [ 69.254729][ T5356] alloc_pages_noprof+0xa9/0x190 [ 69.258347][ T5356] folio_alloc_noprof+0x1e/0x30 [ 69.261012][ T5356] filemap_alloc_folio_noprof+0xdf/0x470 [ 69.263750][ T5356] __filemap_get_folio+0x3f2/0xaf0 [ 69.266228][ T5356] netfs_perform_write+0x43d/0x1ae0 [ 69.269333][ T5356] netfs_file_write_iter+0x17d/0x4a0 [ 69.271880][ T5356] do_iter_readv_writev+0x619/0x8b0 [ 69.274253][ T5356] vfs_writev+0x31a/0x960 [ 69.276426][ T5356] __se_sys_pwritev2+0x179/0x290 [ 69.280007][ T5356] do_syscall_64+0xfa/0x3b0 [ 69.282503][ T5356] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.285441][ T5356] page last free pid 5354 tgid 5354 stack trace: [ 69.288790][ T5356] free_unref_folios+0xdbd/0x1520 [ 69.291242][ T5356] folios_put_refs+0x559/0x640 [ 69.293482][ T5356] free_pages_and_swap_cache+0x277/0x520 [ 69.297064][ T5356] tlb_flush_mmu+0x3a0/0x680 [ 69.301003][ T5356] tlb_finish_mmu+0xc3/0x1d0 [ 69.303538][ T5356] exit_mmap+0x44c/0xb50 [ 69.305595][ T5356] __mmput+0x118/0x430 [ 69.308393][ T5356] exit_mm+0x1da/0x2c0 [ 69.310751][ T5356] do_exit+0x648/0x2300 [ 69.312836][ T5356] do_group_exit+0x21c/0x2d0 [ 69.315058][ T5356] __x64_sys_exit_group+0x3f/0x40 [ 69.318719][ T5356] x64_sys_call+0x21f7/0x2200 [ 69.321017][ T5356] do_syscall_64+0xfa/0x3b0 [ 69.323637][ T5356] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.330076][ T5356] ------------[ cut here ]------------ [ 69.332809][ T5356] kernel BUG at mm/filemap.c:1498! [ 69.335150][ T5356] Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI [ 69.337973][ T5356] CPU: 0 UID: 0 PID: 5356 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 69.341980][ T5356] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 69.347201][ T5356] RIP: 0010:folio_unlock+0x13d/0x160 [ 69.349737][ T5356] Code: aa c7 ff 48 89 df 48 c7 c6 c0 4f b4 8b e8 8b d9 2f ff 90 0f 0b e8 13 aa c7 ff 48 89 df 48 c7 c6 e0 45 b4 8b e8 74 d9 2f ff 90 <0f> 0b e8 fc a9 c7 ff 48 89 df 48 c7 c6 c0 4f b4 8b e8 5d d9 2f ff [ 69.358421][ T5356] RSP: 0018:ffffc9000d4af888 EFLAGS: 00010246 [ 69.362549][ T5356] RAX: cb20c100c0710500 RBX: ffffea0001335180 RCX: 0000000000000000 [ 69.366200][ T5356] RDX: 0000000000000007 RSI: ffffffff8dbbcf26 RDI: 00000000ffffffff [ 69.369657][ T5356] RBP: ffffc9000d4afc48 R08: ffffffff8fc3c637 R09: 1ffffffff1f878c6 [ 69.373061][ T5356] R10: dffffc0000000000 R11: fffffbfff1f878c7 R12: 1ffffd4000266a31 [ 69.376594][ T5356] R13: 04fff20000000020 R14: ffffea0001335188 R15: dffffc0000000000 [ 69.380073][ T5356] FS: 00007fe36d82b6c0(0000) GS:ffff88808d00a000(0000) knlGS:0000000000000000 [ 69.383810][ T5356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.386804][ T5356] CR2: 00007fe36d7e8fc8 CR3: 000000004301f000 CR4: 0000000000352ef0 [ 69.391011][ T5356] Call Trace: [ 69.392937][ T5356] [ 69.394205][ T5356] netfs_perform_write+0x14fc/0x1ae0 [ 69.396479][ T5356] ? __lock_acquire+0xab9/0xd20 [ 69.398565][ T5356] ? __pfx_netfs_perform_write+0x10/0x10 [ 69.401233][ T5356] ? file_update_time+0x2da/0x490 [ 69.403507][ T5356] ? netfs_buffered_write_iter_locked+0x126/0x2a0 [ 69.406226][ T5356] ? netfs_file_write_iter+0x167/0x4a0 [ 69.408608][ T5356] netfs_file_write_iter+0x17d/0x4a0 [ 69.410923][ T5356] vfs_write+0x5c9/0xb30 [ 69.412829][ T5356] ? __pfx_v9fs_file_write_iter+0x10/0x10 [ 69.415398][ T5356] ? __pfx_vfs_write+0x10/0x10 [ 69.417680][ T5356] ? __fget_files+0x2a/0x420 [ 69.419778][ T5356] ksys_write+0x145/0x250 [ 69.421607][ T5356] ? __pfx_ksys_write+0x10/0x10 [ 69.423754][ T5356] ? rcu_is_watching+0x15/0xb0 [ 69.425863][ T5356] ? do_syscall_64+0xbe/0x3b0 [ 69.428017][ T5356] do_syscall_64+0xfa/0x3b0 [ 69.430168][ T5356] ? lockdep_hardirqs_on+0x9c/0x150 [ 69.432854][ T5356] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.435641][ T5356] ? clear_bhb_loop+0x60/0xb0 [ 69.437729][ T5356] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.440407][ T5356] RIP: 0033:0x7fe36c98eba9 [ 69.442392][ T5356] 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 a8 ff ff ff f7 d8 64 89 01 48 [ 69.451685][ T5356] RSP: 002b:00007fe36d82b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 69.455754][ T5356] RAX: ffffffffffffffda RBX: 00007fe36cbd5fa0 RCX: 00007fe36c98eba9 [ 69.459258][ T5356] RDX: 0000000000000018 RSI: 0000200000000380 RDI: 0000000000000008 [ 69.462648][ T5356] RBP: 00007fe36ca11e19 R08: 0000000000000000 R09: 0000000000000000 [ 69.466139][ T5356] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 69.469788][ T5356] R13: 00007fe36cbd6038 R14: 00007fe36cbd5fa0 R15: 00007ffd6af09598 [ 69.473470][ T5356] [ 69.474917][ T5356] Modules linked in: [ 69.477136][ T5356] ---[ end trace 0000000000000000 ]--- [ 69.483897][ T5356] RIP: 0010:folio_unlock+0x13d/0x160 [ 69.486633][ T5356] Code: aa c7 ff 48 89 df 48 c7 c6 c0 4f b4 8b e8 8b d9 2f ff 90 0f 0b e8 13 aa c7 ff 48 89 df 48 c7 c6 e0 45 b4 8b e8 74 d9 2f ff 90 <0f> 0b e8 fc a9 c7 ff 48 89 df 48 c7 c6 c0 4f b4 8b e8 5d d9 2f ff [ 69.496106][ T5356] RSP: 0018:ffffc9000d4af888 EFLAGS: 00010246 [ 69.500290][ T5356] RAX: cb20c100c0710500 RBX: ffffea0001335180 RCX: 0000000000000000 [ 69.504383][ T5356] RDX: 0000000000000007 RSI: ffffffff8dbbcf26 RDI: 00000000ffffffff [ 69.508060][ T5356] RBP: ffffc9000d4afc48 R08: ffffffff8fc3c637 R09: 1ffffffff1f878c6 [ 69.511466][ T5356] R10: dffffc0000000000 R11: fffffbfff1f878c7 R12: 1ffffd4000266a31 [ 69.514651][ T5356] R13: 04fff20000000020 R14: ffffea0001335188 R15: dffffc0000000000 [ 69.519196][ T5356] FS: 00007fe36d82b6c0(0000) GS:ffff88808d00a000(0000) knlGS:0000000000000000 [ 69.523363][ T5356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.526124][ T5356] CR2: 00007fe36d7e8fc8 CR3: 000000004301f000 CR4: 0000000000352ef0 [ 69.530169][ T5356] Kernel panic - not syncing: Fatal exception [ 69.533316][ T5356] Kernel Offset: disabled [ 69.535330][ T5356] Rebooting in 86400 seconds..