Warning: Permanently added '10.128.0.109' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 28.136015] hfsplus: unable to set blocksize to 1024! [ 28.141415] hfsplus: unable to find HFS+ superblock executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.556460] hfsplus: unable to set blocksize to 1024! [ 28.561679] hfsplus: unable to find HFS+ superblock executing program executing program executing program executing program executing program executing program executing program executing program [ 28.915321] hfsplus: unable to find HFS+ superblock executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.654821] loop_set_block_size: loop5 () has still dirty pages (nrpages=2) [ 29.695205] loop_set_block_size: loop5 () has still dirty pages (nrpages=2) [ 29.734795] loop_set_block_size: loop5 () has still dirty pages (nrpages=8) executing program executing program executing program executing program executing program executing program executing program [ 30.084491] loop_set_block_size: loop5 () has still dirty pages (nrpages=1) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.624924] loop_set_block_size: loop5 () has still dirty pages (nrpages=1) [ 30.664228] loop_set_block_size: loop5 () has still dirty pages (nrpages=2) executing program [ 30.695177] loop_set_block_size: loop5 () has still dirty pages (nrpages=3) executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.074279] hfsplus: unable to set blocksize to 1024! [ 31.096063] hfsplus: unable to find HFS+ superblock executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.666350] hfsplus: unable to set blocksize to 1024! [ 31.671805] hfsplus: unable to find HFS+ superblock executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 32.173590] loop_set_block_size: loop5 () has still dirty pages (nrpages=1) executing program [ 32.223607] loop_set_block_size: loop5 () has still dirty pages (nrpages=1) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 32.652626] print_req_error: I/O error, dev loop4, sector 0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.206657] hfsplus: unable to find HFS+ superblock executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.842999] hfsplus: unable to find HFS+ superblock executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.963373] hfsplus: unable to set blocksize to 1024! [ 34.968751] hfsplus: unable to find HFS+ superblock executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 35.552367] hfsplus: unable to set blocksize to 1024! [ 35.558186] hfsplus: unable to find HFS+ superblock executing program executing program executing program executing program executing program executing program executing program [ 35.951882] loop_set_block_size: loop5 () has still dirty pages (nrpages=1) [ 35.972265] loop_set_block_size: loop5 () has still dirty pages (nrpages=2) executing program [ 36.002059] loop_set_block_size: loop5 () has still dirty pages (nrpages=3) [ 36.041902] loop_set_block_size: loop5 () has still dirty pages (nrpages=2) executing program executing program [ 36.102549] loop_set_block_size: loop5 () has still dirty pages (nrpages=1) executing program executing program executing program executing program executing program [ 36.322851] ================================================================== [ 36.330400] BUG: KASAN: slab-out-of-bounds in memcpy_from_page+0x8c/0x110 [ 36.337380] Read of size 2048 at addr ffff8880ab132080 by task loop5/8754 [ 36.344300] [ 36.345923] CPU: 0 PID: 8754 Comm: loop5 Not tainted 4.14.300-syzkaller #0 [ 36.352923] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 36.362268] Call Trace: [ 36.364839] dump_stack+0x1b2/0x281 [ 36.368446] print_address_description.cold+0x54/0x1d3 [ 36.373703] kasan_report_error.cold+0x8a/0x191 [ 36.378348] ? memcpy_from_page+0x8c/0x110 [ 36.382559] kasan_report+0x6f/0x80 [ 36.386167] ? memcpy_from_page+0x8c/0x110 [ 36.390381] memcpy+0x20/0x50 [ 36.393464] memcpy_from_page+0x8c/0x110 [ 36.397505] iov_iter_copy_from_user_atomic+0x5dc/0xa20 [ 36.402849] generic_perform_write+0x22b/0x430 [ 36.407412] ? __mnt_drop_write_file+0x5f/0x90 [ 36.411972] ? filemap_page_mkwrite+0x2d0/0x2d0 [ 36.416628] ? current_time+0xb0/0xb0 [ 36.420426] ? lock_acquire+0x170/0x3f0 [ 36.424389] __generic_file_write_iter+0x227/0x590 [ 36.429314] generic_file_write_iter+0x36f/0x650 [ 36.434058] do_iter_readv_writev+0x4cf/0x5f0 [ 36.438551] ? clone_verify_area+0x1e0/0x1e0 [ 36.442937] ? rw_verify_area+0xe1/0x2a0 [ 36.446981] do_iter_write+0x152/0x550 [ 36.450855] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 36.456288] vfs_iter_write+0x70/0xa0 [ 36.460097] lo_write_bvec+0x114/0x310 [ 36.463964] ? loop_attr_do_show_backing_file+0x1a0/0x1a0 [ 36.469478] ? __lock_acquire+0x5fc/0x3f20 [ 36.473693] ? finish_task_switch+0x178/0x610 [ 36.478166] loop_queue_work+0x9f2/0x21e0 [ 36.482296] ? _raw_spin_unlock_irq+0x5a/0x80 [ 36.486767] ? finish_task_switch+0x178/0x610 [ 36.491238] ? finish_task_switch+0x14d/0x610 [ 36.495831] ? __switch_to_asm+0x33/0x60 [ 36.499865] ? __switch_to_asm+0x27/0x60 [ 36.503905] ? lo_fallocate.isra.0+0x120/0x120 [ 36.508463] ? __schedule+0x893/0x1de0 [ 36.512330] ? lock_acquire+0x170/0x3f0 [ 36.516289] ? lock_downgrade+0x740/0x740 [ 36.520413] ? _raw_spin_unlock_irq+0x24/0x80 [ 36.524888] kthread_worker_fn+0x271/0x6c0 [ 36.529104] ? __kthread_init_worker+0xf0/0xf0 [ 36.533668] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 36.538801] ? loop_get_status64+0x100/0x100 [ 36.543188] kthread+0x30d/0x420 [ 36.546548] ? kthread_create_on_node+0xd0/0xd0 [ 36.551195] ret_from_fork+0x24/0x30 [ 36.554886] [ 36.556576] Allocated by task 8745: [ 36.560183] kasan_kmalloc+0xeb/0x160 [ 36.563961] __kmalloc+0x15a/0x400 [ 36.567477] hfsplus_read_wrapper+0x281/0xd70 [ 36.571945] hfsplus_fill_super+0x331/0x1850 [ 36.576335] mount_bdev+0x2b3/0x360 [ 36.579938] mount_fs+0x92/0x2a0 [ 36.583282] vfs_kern_mount.part.0+0x5b/0x470 [ 36.587755] do_mount+0xe65/0x2a30 [ 36.591273] SyS_mount+0xa8/0x120 [ 36.594703] do_syscall_64+0x1d5/0x640 [ 36.598569] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 36.603733] [ 36.605337] Freed by task 4631: [ 36.608593] kasan_slab_free+0xc3/0x1a0 [ 36.612543] kfree+0xc9/0x250 [ 36.615627] skb_release_data+0x5f6/0x820 [ 36.619750] consume_skb+0xe0/0x380 [ 36.623353] skb_free_datagram+0x16/0xe0 [ 36.627391] unix_dgram_recvmsg+0x67e/0xc60 [ 36.631687] sock_recvmsg+0xc0/0x100 [ 36.635375] ___sys_recvmsg+0x20b/0x4d0 [ 36.639327] __sys_recvmsg+0xa0/0x120 [ 36.643102] SyS_recvmsg+0x27/0x40 [ 36.646620] do_syscall_64+0x1d5/0x640 [ 36.650482] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 36.655642] [ 36.657250] The buggy address belongs to the object at ffff8880ab132080 [ 36.657250] which belongs to the cache kmalloc-512 of size 512 [ 36.669883] The buggy address is located 0 bytes inside of [ 36.669883] 512-byte region [ffff8880ab132080, ffff8880ab132280) [ 36.681556] The buggy address belongs to the page: [ 36.686460] page:ffffea0002ac4c80 count:1 mapcount:0 mapping:ffff8880ab132080 index:0xffff8880ab132d00 [ 36.695879] flags: 0xfff00000000100(slab) [ 36.700092] raw: 00fff00000000100 ffff8880ab132080 ffff8880ab132d00 0000000100000004 [ 36.707967] raw: ffffea0002c0efa0 ffffea0002bd6ee0 ffff88813fe74940 0000000000000000 [ 36.715820] page dumped because: kasan: bad access detected [ 36.721505] [ 36.723114] Memory state around the buggy address: [ 36.728018] ffff8880ab132180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.735355] ffff8880ab132200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.742688] >ffff8880ab132280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.750020] ^ [ 36.753361] ffff8880ab132300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.760782] ffff8880ab132380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program [ 36.768118] ================================================================== [ 36.775448] Disabling lock debugging due to kernel taint [ 36.781045] Kernel panic - not syncing: panic_on_warn set ... [ 36.781045] [ 36.788405] CPU: 0 PID: 8754 Comm: loop5 Tainted: G B 4.14.300-syzkaller #0 [ 36.796623] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 36.805978] Call Trace: [ 36.808561] dump_stack+0x1b2/0x281 [ 36.812186] panic+0x1f9/0x42d [ 36.815373] ? add_taint.cold+0x16/0x16 [ 36.819348] kasan_end_report+0x43/0x49 [ 36.823329] kasan_report_error.cold+0xa7/0x191 [ 36.827996] ? memcpy_from_page+0x8c/0x110 [ 36.832234] kasan_report+0x6f/0x80 [ 36.835863] ? memcpy_from_page+0x8c/0x110 [ 36.840105] memcpy+0x20/0x50 [ 36.843208] memcpy_from_page+0x8c/0x110 [ 36.847267] iov_iter_copy_from_user_atomic+0x5dc/0xa20 [ 36.852631] generic_perform_write+0x22b/0x430 [ 36.857213] ? __mnt_drop_write_file+0x5f/0x90 [ 36.861794] ? filemap_page_mkwrite+0x2d0/0x2d0 [ 36.866461] ? current_time+0xb0/0xb0 [ 36.870260] ? lock_acquire+0x170/0x3f0 [ 36.874242] __generic_file_write_iter+0x227/0x590 [ 36.879167] generic_file_write_iter+0x36f/0x650 [ 36.883953] do_iter_readv_writev+0x4cf/0x5f0 [ 36.888536] ? clone_verify_area+0x1e0/0x1e0 [ 36.893020] ? rw_verify_area+0xe1/0x2a0 [ 36.897062] do_iter_write+0x152/0x550 [ 36.900939] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 36.906378] vfs_iter_write+0x70/0xa0 [ 36.910157] lo_write_bvec+0x114/0x310 [ 36.914018] ? loop_attr_do_show_backing_file+0x1a0/0x1a0 [ 36.919531] ? __lock_acquire+0x5fc/0x3f20 [ 36.923739] ? finish_task_switch+0x178/0x610 [ 36.928210] loop_queue_work+0x9f2/0x21e0 [ 36.932358] ? _raw_spin_unlock_irq+0x5a/0x80 [ 36.936828] ? finish_task_switch+0x178/0x610 [ 36.941382] ? finish_task_switch+0x14d/0x610 [ 36.945857] ? __switch_to_asm+0x33/0x60 [ 36.949890] ? __switch_to_asm+0x27/0x60 [ 36.953925] ? lo_fallocate.isra.0+0x120/0x120 [ 36.958484] ? __schedule+0x893/0x1de0 [ 36.962344] ? lock_acquire+0x170/0x3f0 [ 36.966377] ? lock_downgrade+0x740/0x740 [ 36.970496] ? _raw_spin_unlock_irq+0x24/0x80 [ 36.974962] kthread_worker_fn+0x271/0x6c0 [ 36.979177] ? __kthread_init_worker+0xf0/0xf0 [ 36.983730] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 36.988805] ? loop_get_status64+0x100/0x100 [ 36.993186] kthread+0x30d/0x420 [ 36.996525] ? kthread_create_on_node+0xd0/0xd0 [ 37.001166] ret_from_fork+0x24/0x30 [ 37.005019] Kernel Offset: disabled [ 37.008803] Rebooting in 86400 seconds..