Warning: Permanently added '10.128.0.224' (ED25519) to the list of known hosts. executing program [ 42.281934][ T4020] loop0: detected capacity change from 0 to 1024 [ 42.337360][ T4020] ======================================================= [ 42.337360][ T4020] WARNING: The mand mount option has been deprecated and [ 42.337360][ T4020] and is ignored by this kernel. Remove the mand [ 42.337360][ T4020] option from the mount to silence this warning. [ 42.337360][ T4020] ======================================================= [ 42.353220][ T4020] EXT4-fs (loop0): Ignoring removed nobh option [ 42.354996][ T4020] EXT4-fs (loop0): Ignoring removed bh option [ 42.356903][ T4020] EXT4-fs (loop0): Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 42.371916][ T4020] EXT4-fs (loop0): mounted filesystem without journal. Opts: delalloc,data_err=abort,barrier=0x0000000000000002,dioread_lock,data_err=ignore,max_dir_size_kb=0x00000000004007b1,data_err=ignore,grpquota,nobh,user_xattr,bh,dioread_nolock,,errors=continue. Quota mode: writeback. [ 42.400100][ T1109] ================================================================== [ 42.402491][ T1109] BUG: KASAN: use-after-free in ext4_find_extent+0x994/0xb6c [ 42.404586][ T1109] Read of size 4 at addr ffff0001b34a989c by task kworker/u4:4/1109 [ 42.406790][ T1109] [ 42.407439][ T1109] CPU: 1 PID: 1109 Comm: kworker/u4:4 Not tainted 5.15.181-syzkaller #0 [ 42.409734][ T1109] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 42.412576][ T1109] Workqueue: writeback wb_workfn (flush-7:0) [ 42.414278][ T1109] Call trace: [ 42.415168][ T1109] dump_backtrace+0x0/0x43c [ 42.416543][ T1109] show_stack+0x2c/0x3c [ 42.417727][ T1109] __dump_stack+0x30/0x40 [ 42.418931][ T1109] dump_stack_lvl+0xf8/0x160 [ 42.420199][ T1109] print_address_description+0x78/0x30c [ 42.421860][ T1109] kasan_report+0xec/0x15c [ 42.423112][ T1109] __asan_report_load4_noabort+0x44/0x50 [ 42.424701][ T1109] ext4_find_extent+0x994/0xb6c [ 42.426069][ T1109] ext4_ext_map_blocks+0x234/0x5628 [ 42.427526][ T1109] ext4_map_blocks+0x7b8/0x167c [ 42.428832][ T1109] ext4_writepages+0xf00/0x2c14 [ 42.430185][ T1109] do_writepages+0x36c/0x578 [ 42.431486][ T1109] __writeback_single_inode+0x148/0x11f0 [ 42.433117][ T1109] writeback_sb_inodes+0x7fc/0x1378 [ 42.434598][ T1109] wb_writeback+0x3d8/0xe44 [ 42.435827][ T1109] wb_workfn+0x350/0xdd8 [ 42.436982][ T1109] process_one_work+0x79c/0x1140 [ 42.438357][ T1109] worker_thread+0x8f4/0x101c [ 42.439619][ T1109] kthread+0x374/0x454 [ 42.440719][ T1109] ret_from_fork+0x10/0x20 [ 42.441913][ T1109] [ 42.442555][ T1109] The buggy address belongs to the page: [ 42.444008][ T1109] page:00000000086ee22f refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x1f34a9 [ 42.446863][ T1109] flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) [ 42.448830][ T1109] raw: 05ffc00000000000 fffffc00058d1008 fffffc00062734c8 0000000000000000 [ 42.451197][ T1109] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 [ 42.453432][ T1109] page dumped because: kasan: bad access detected [ 42.455207][ T1109] [ 42.455879][ T1109] Memory state around the buggy address: [ 42.457422][ T1109] ffff0001b34a9780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 42.459717][ T1109] ffff0001b34a9800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 42.462081][ T1109] >ffff0001b34a9880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 42.464315][ T1109] ^ [ 42.465620][ T1109] ffff0001b34a9900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 42.467859][ T1109] ffff0001b34a9980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 42.470011][ T1109] ================================================================== [ 42.472232][ T1109] Disabling lock debugging due to kernel taint [ 42.474143][ T1109] ------------[ cut here ]------------ [ 42.475642][ T1109] kernel BUG at fs/ext4/inode.c:2420! [ 42.477146][ T1109] Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP [ 42.479283][ T1109] Modules linked in: [ 42.480318][ T1109] CPU: 1 PID: 1109 Comm: kworker/u4:4 Tainted: G B 5.15.181-syzkaller #0 [ 42.483041][ T1109] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 42.485761][ T1109] Workqueue: writeback wb_workfn (flush-7:0) [ 42.487444][ T1109] pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 42.489599][ T1109] pc : ext4_writepages+0x2b2c/0x2c14 [ 42.491055][ T1109] lr : ext4_writepages+0x2b2c/0x2c14 [ 42.492511][ T1109] sp : ffff800021366ee0 [ 42.493589][ T1109] x29: ffff800021367200 x28: 0000000000000000 x27: ffff8000213675f0 [ 42.495842][ T1109] x26: dfff800000000000 x25: ffff0000caf26000 x24: ffff0000dbec3478 [ 42.498013][ T1109] x23: ffff0000caf26050 x22: 0000000000000000 x21: 1fffe0001b7d8694 [ 42.500333][ T1109] x20: 0000000000000000 x19: 0000000000000010 x18: 0000000000000002 [ 42.502629][ T1109] x17: 0000000000000000 x16: ffff8000111a3970 x15: ffff8000089ab238 [ 42.504873][ T1109] x14: ffff8000089aca14 x13: ffff80000820c0e4 x12: 0000000000ff0100 [ 42.507110][ T1109] x11: 0000000000000000 x10: 0000000000000000 x9 : ffff800008cc678c [ 42.509299][ T1109] x8 : ffff0000c9963680 x7 : 0000000000000000 x6 : ffff8000089a9a78 [ 42.511559][ T1109] x5 : ffff0000c8712c28 x4 : 0000000000000000 x3 : ffff8000082b6e58 [ 42.513891][ T1109] x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000 [ 42.516152][ T1109] Call trace: [ 42.517059][ T1109] ext4_writepages+0x2b2c/0x2c14 [ 42.518512][ T1109] do_writepages+0x36c/0x578 [ 42.519826][ T1109] __writeback_single_inode+0x148/0x11f0 [ 42.521360][ T1109] writeback_sb_inodes+0x7fc/0x1378 [ 42.522828][ T1109] wb_writeback+0x3d8/0xe44 [ 42.524049][ T1109] wb_workfn+0x350/0xdd8 [ 42.525252][ T1109] process_one_work+0x79c/0x1140 [ 42.526579][ T1109] worker_thread+0x8f4/0x101c [ 42.527868][ T1109] kthread+0x374/0x454 [ 42.528963][ T1109] ret_from_fork+0x10/0x20 [ 42.530179][ T1109] Code: f94063f6 f2fbfffa 17fffe23 97dec859 (d4210000) [ 42.532070][ T1109] ---[ end trace 65b2ab22db68a75f ]--- [ 42.856405][ T1109] Kernel panic - not syncing: Oops - BUG: Fatal exception [ 42.858423][ T1109] SMP: stopping secondary CPUs [ 42.859821][ T1109] Kernel Offset: disabled [ 42.860995][ T1109] CPU features: 0x8,000081c1,21302e40 [ 42.862457][ T1109] Memory Limit: none [ 43.159056][ T1109] Rebooting in 86400 seconds..