blkno = 5002f, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map ================================================================== BUG: KASAN: use-after-free in jfs_lazycommit+0x658/0xa40 fs/jfs/jfs_txnmgr.c:2769 Read of size 4 at addr ffff0000ce47fc94 by task jfsCommit/240 CPU: 0 PID: 240 Comm: jfsCommit Not tainted 5.15.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x174/0x1e4 mm/kasan/report.c:451 __asan_report_load4_noabort+0x44/0x50 mm/kasan/report_generic.c:308 jfs_lazycommit+0x658/0xa40 fs/jfs/jfs_txnmgr.c:2769 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Allocated by task 5013: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] kmem_cache_alloc_trace+0x27c/0x47c mm/slub.c:3247 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] jfs_fill_super+0x108/0xa08 fs/jfs/super.c:500 mount_bdev+0x274/0x370 fs/super.c:1400 jfs_do_mount+0x44/0x58 fs/jfs/super.c:675 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1530 do_new_mount+0x278/0x8fc fs/namespace.c:3012 path_mount+0x594/0x101c fs/namespace.c:3342 do_mount fs/namespace.c:3355 [inline] __do_sys_mount fs/namespace.c:3563 [inline] __se_sys_mount fs/namespace.c:3540 [inline] __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3540 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Freed by task 4856: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x84 mm/kasan/common.c:46 kasan_set_free_info+0x28/0x4c mm/kasan/generic.c:360 ____kasan_slab_free+0x118/0x164 mm/kasan/common.c:366 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0x128/0x1ec mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kfree+0x178/0x410 mm/slub.c:4559 jfs_put_super+0x144/0x188 fs/jfs/super.c:203 generic_shutdown_super+0x130/0x2f0 fs/super.c:475 kill_block_super+0x70/0xdc fs/super.c:1427 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0x108/0x128 fs/super.c:366 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x130/0x1e4 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348 kvfree_call_rcu+0xb8/0x684 kernel/rcu/tree.c:3596 drop_sysctl_table+0x274/0x3a0 fs/proc/proc_sysctl.c:1678 drop_sysctl_table+0x284/0x3a0 fs/proc/proc_sysctl.c:1681 unregister_sysctl_table+0x94/0x130 fs/proc/proc_sysctl.c:1716 unregister_net_sysctl_table+0x20/0x30 net/sysctl_net.c:175 ip_vs_control_net_cleanup_sysctl net/netfilter/ipvs/ip_vs_ctl.c:4130 [inline] ip_vs_control_net_cleanup+0x1ac/0x2f0 net/netfilter/ipvs/ip_vs_ctl.c:4216 __ip_vs_cleanup_batch+0x94/0x100 net/netfilter/ipvs/ip_vs_core.c:2458 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x5e0/0x9bc net/core/net_namespace.c:599 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Second to last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348 insert_work+0x64/0x394 kernel/workqueue.c:1366 __queue_work+0xb84/0x114c kernel/workqueue.c:1532 queue_work_on+0xc4/0x17c kernel/workqueue.c:1559 queue_work include/linux/workqueue.h:512 [inline] call_usermodehelper_exec+0x238/0x484 kernel/umh.c:435 kobject_uevent_env+0x678/0x898 lib/kobject_uevent.c:633 kobject_uevent+0x2c/0x3c lib/kobject_uevent.c:657 driver_register+0x29c/0x374 drivers/base/driver.c:248 usb_register_driver+0x1bc/0x3a0 drivers/usb/core/driver.c:1061 rndis_wlan_driver_init+0x28/0x34 drivers/net/wireless/rndis_wlan.c:3748 do_one_initcall+0x234/0x990 init/main.c:1302 do_initcall_level+0x154/0x214 init/main.c:1375 do_initcalls+0x58/0xac init/main.c:1391 do_basic_setup+0x8c/0xa0 init/main.c:1410 kernel_init_freeable+0x460/0x640 init/main.c:1615 kernel_init+0x24/0x294 init/main.c:1506 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff0000ce47fc00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 148 bytes inside of 256-byte region [ffff0000ce47fc00, ffff0000ce47fd00) The buggy address belongs to the page: page:0000000046ed9e6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10e47e head:0000000046ed9e6e order:1 compound_mapcount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002480 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000ce47fb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000ce47fc00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000ce47fc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000ce47fd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000ce47fd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002e, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002f, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002e, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002f, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002e, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002f, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002e, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002f, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002e, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002f, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002e, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002f, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002e, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002f, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002e, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002f, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002e, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002f, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002e, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002f, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002c, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map blkno = 5002d, nblocks = 1 ERROR: (device loop0): dbUpdatePMap: blocks are outside the map