================================================================== BUG: KASAN: slab-use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:197 [inline] BUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/mutex.c:686 [inline] BUG: KASAN: slab-use-after-free in __mutex_lock+0x8f4/0x9d0 kernel/locking/mutex.c:752 Read of size 8 at addr ffff888000235908 by task jfsCommit/135 CPU: 2 PID: 135 Comm: jfsCommit Not tainted 6.8.0-rc4-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc4/0x620 mm/kasan/report.c:488 kasan_report+0xda/0x110 mm/kasan/report.c:601 __mutex_waiter_is_first kernel/locking/mutex.c:197 [inline] __mutex_lock_common kernel/locking/mutex.c:686 [inline] __mutex_lock+0x8f4/0x9d0 kernel/locking/mutex.c:752 jfs_syncpt+0x2a/0xa0 fs/jfs/jfs_logmgr.c:1039 txEnd+0x30d/0x5a0 fs/jfs/jfs_txnmgr.c:549 txLazyCommit fs/jfs/jfs_txnmgr.c:2684 [inline] jfs_lazycommit+0x77d/0xb20 fs/jfs/jfs_txnmgr.c:2733 kthread+0x2c6/0x3b0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 Allocated by task 9288: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:372 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:389 kmalloc include/linux/slab.h:590 [inline] kzalloc include/linux/slab.h:711 [inline] open_inline_log fs/jfs/jfs_logmgr.c:1159 [inline] lmLogOpen+0x576/0x1410 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0x2ea/0x700 fs/jfs/jfs_mount.c:257 jfs_fill_super+0x9d6/0xd20 fs/jfs/super.c:565 mount_bdev+0x1e3/0x2d0 fs/super.c:1663 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1784 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x6e2/0x1f10 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7c/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x33/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7c/0x86 Freed by task 5221: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:640 poison_slab_object mm/kasan/common.c:241 [inline] __kasan_slab_free+0x121/0x1c0 mm/kasan/common.c:257 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x124/0x370 mm/slub.c:4409 lmLogClose+0x585/0x710 fs/jfs/jfs_logmgr.c:1461 jfs_umount+0x2f0/0x440 fs/jfs/jfs_umount.c:114 jfs_put_super+0x88/0x1d0 fs/jfs/super.c:194 generic_shutdown_super+0x159/0x3d0 fs/super.c:646 kill_block_super+0x3b/0x90 fs/super.c:1680 deactivate_locked_super+0xbe/0x1a0 fs/super.c:477 deactivate_super+0xde/0x100 fs/super.c:510 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14f/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:108 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0x281/0x2b0 kernel/entry/common.c:212 __do_fast_syscall_32+0x8c/0x120 arch/x86/entry/common.c:324 do_fast_syscall_32+0x33/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7c/0x86 The buggy address belongs to the object at ffff888000235800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 264 bytes inside of freed 1024-byte region [ffff888000235800, ffff888000235c00) The buggy address belongs to the physical page: page:ffffea0000008c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x230 head:ffffea0000008c00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x7ff00000000840(slab|head|node=0|zone=0|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 007ff00000000840 ffff888014c42dc0 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5244, tgid 5244 (syz-executor.1), ts 207757225321, free_ts 207664566417 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3311 __alloc_pages+0x22f/0x2440 mm/page_alloc.c:4567 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2190 [inline] allocate_slab mm/slub.c:2354 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2407 ___slab_alloc+0x4b0/0x1780 mm/slub.c:3540 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3625 __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] __do_kmalloc_node mm/slub.c:3980 [inline] __kmalloc_node_track_caller+0x35f/0x460 mm/slub.c:4001 kmalloc_reserve+0xef/0x260 net/core/skbuff.c:582 __alloc_skb+0x12b/0x330 net/core/skbuff.c:651 alloc_skb include/linux/skbuff.h:1296 [inline] nlmsg_new include/net/netlink.h:1010 [inline] inet6_rt_notify+0xf0/0x2b0 net/ipv6/route.c:6171 fib6_add_rt2node net/ipv6/ip6_fib.c:1251 [inline] fib6_add+0x2305/0x4440 net/ipv6/ip6_fib.c:1477 __ip6_ins_rt net/ipv6/route.c:1303 [inline] ip6_ins_rt+0xb6/0x110 net/ipv6/route.c:1313 __ipv6_ifa_notify+0x9ca/0xc20 net/ipv6/addrconf.c:6205 ipv6_ifa_notify net/ipv6/addrconf.c:6244 [inline] add_addr+0x23e/0x350 net/ipv6/addrconf.c:3149 add_v4_addrs+0x722/0xa00 net/ipv6/addrconf.c:3208 addrconf_gre_config net/ipv6/addrconf.c:3484 [inline] addrconf_init_auto_addrs+0x18a/0x820 net/ipv6/addrconf.c:3502 page last free pid 42 tgid 42 stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1140 [inline] free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2346 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2486 __folio_put_small mm/swap.c:106 [inline] __folio_put+0xc3/0x110 mm/swap.c:129 folio_put include/linux/mm.h:1494 [inline] migrate_folio_done+0x27a/0x320 mm/migrate.c:1103 migrate_folio_move mm/migrate.c:1326 [inline] migrate_pages_batch+0x18af/0x2c60 mm/migrate.c:1775 migrate_pages_sync mm/migrate.c:1841 [inline] migrate_pages+0x1b31/0x27d0 mm/migrate.c:1950 compact_zone+0x1dcb/0x3f90 mm/compaction.c:2554 kcompactd_do_work+0x340/0x6f0 mm/compaction.c:3014 kcompactd+0xa74/0xd80 mm/compaction.c:3113 kthread+0x2c6/0x3b0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 Memory state around the buggy address: ffff888000235800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888000235880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888000235900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888000235980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888000235a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================