==================================================================
BUG: KASAN: use-after-free in smc_fback_error_report+0x96/0xa0 net/smc/af_smc.c:670
Read of size 8 at addr ffff88804a17d068 by task kworker/u4:5/1031
CPU: 1 PID: 1031 Comm: kworker/u4:5 Not tainted 5.17.0-rc8-syzkaller-00045-g551acdc3c3d2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description.constprop.0.cold+0x8d/0x336 mm/kasan/report.c:255
__kasan_report mm/kasan/report.c:442 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
smc_fback_error_report+0x96/0xa0 net/smc/af_smc.c:670
sk_error_report+0x35/0x310 net/core/sock.c:340
tcp_write_err net/ipv4/tcp_timer.c:71 [inline]
tcp_probe_timer net/ipv4/tcp_timer.c:395 [inline]
tcp_write_timer_handler+0x437/0xbc0 net/ipv4/tcp_timer.c:626
tcp_write_timer+0xa2/0x2b0 net/ipv4/tcp_timer.c:642
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x67c/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:radix_tree_descend lib/radix-tree.c:87 [inline]
RIP: 0010:__radix_tree_lookup+0x16b/0x2a0 lib/radix-tree.c:764
Code: fd 3f 0f 87 d1 f8 14 05 e8 62 1a 75 fd 4d 89 f7 44 89 e9 49 d3 ef 41 83 e7 3f 4a 8d 7c fb 28 48 89 f8 48 c1 e8 03 80 3c 28 00 <0f> 85 e4 00 00 00 49 8d 47 04 4c 8b 64 c3 08 4e 8d 7c fb 28 49 81
RSP: 0018:ffffc90004ab7788 EFLAGS: 00000246
RAX: 1ffff1100e3e8771 RBX: ffff888071f439c0 RCX: 0000000000000000
RDX: ffff88801bd3d700 RSI: ffffffff8403a5ce RDI: ffff888071f43b88
RBP: dffffc0000000000 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffff8403a5bf R11: 000000000000003f R12: 1ffff1100e3e8738
R13: 0000000000000000 R14: 00000000001aedf4 R15: 0000000000000034
radix_tree_delete_item+0x9f/0x230 lib/radix-tree.c:1419
kernfs_put.part.0+0x294/0x540 fs/kernfs/dir.c:537
kernfs_put+0x42/0x50 fs/kernfs/dir.c:513
__kernfs_remove+0x7a3/0xb20 fs/kernfs/dir.c:1388
kernfs_remove_by_name_ns+0xa8/0x110 fs/kernfs/dir.c:1565
kernfs_remove_by_name include/linux/kernfs.h:574 [inline]
remove_files+0x96/0x1c0 fs/sysfs/group.c:28
sysfs_remove_group+0x87/0x170 fs/sysfs/group.c:288
sysfs_remove_groups fs/sysfs/group.c:312 [inline]
sysfs_remove_groups+0x5c/0xa0 fs/sysfs/group.c:304
destroy_port drivers/infiniband/core/sysfs.c:1285 [inline]
ib_free_port_attrs+0x162/0x460 drivers/infiniband/core/sysfs.c:1410
remove_one_compat_dev drivers/infiniband/core/device.c:1001 [inline]
rdma_dev_exit_net+0x2b2/0x550 drivers/infiniband/core/device.c:1139
ops_exit_list+0xb0/0x170 net/core/net_namespace.c:168
cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:597
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
The buggy address belongs to the page:
page:ffffea0001285f40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4a17d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 ffffea0001e4b708 ffffea0001fa4488 0000000000000000
raw: 0000000000000000 0000000000110000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 27677, ts 755084329843, free_ts 776409990668
prep_new_page mm/page_alloc.c:2434 [inline]
get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4165
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5389
alloc_pages+0x1aa/0x310 mm/mempolicy.c:2271
alloc_slab_page mm/slub.c:1799 [inline]
allocate_slab+0x27f/0x3c0 mm/slub.c:1944
new_slab mm/slub.c:2004 [inline]
___slab_alloc+0xbe1/0x12b0 mm/slub.c:3018
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3105
slab_alloc_node mm/slub.c:3196 [inline]
slab_alloc mm/slub.c:3238 [inline]
kmem_cache_alloc+0x3cb/0x4b0 mm/slub.c:3243
kmem_cache_zalloc include/linux/slab.h:704 [inline]
__kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:585
kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:647
__kernfs_create_file+0x51/0x350 fs/kernfs/file.c:987
sysfs_add_file_mode_ns+0x20f/0x3f0 fs/sysfs/file.c:294
create_files fs/sysfs/group.c:64 [inline]
internal_create_group+0x322/0xb10 fs/sysfs/group.c:148
internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:188
internal_create_groups fs/sysfs/group.c:184 [inline]
sysfs_create_groups+0x25/0x50 fs/sysfs/group.c:214
setup_gid_attrs drivers/infiniband/core/sysfs.c:1169 [inline]
ib_setup_port_attrs+0x3e7/0x5c0 drivers/infiniband/core/sysfs.c:1441
add_one_compat_dev drivers/infiniband/core/device.c:968 [inline]
add_one_compat_dev+0x517/0x7f0 drivers/infiniband/core/device.c:919
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1352 [inline]
free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1404
free_unref_page_prepare mm/page_alloc.c:3325 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3404
__unfreeze_partials+0x320/0x340 mm/slub.c:2536
qlink_free mm/kasan/quarantine.c:157 [inline]
qlist_free_all+0x6d/0x160 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446
kasan_slab_alloc include/linux/kasan.h:260 [inline]
slab_post_alloc_hook mm/slab.h:732 [inline]
slab_alloc_node mm/slub.c:3230 [inline]
slab_alloc mm/slub.c:3238 [inline]
kmem_cache_alloc+0x271/0x4b0 mm/slub.c:3243
getname_flags.part.0+0x50/0x4f0 fs/namei.c:138
getname_flags include/linux/audit.h:323 [inline]
getname fs/namei.c:217 [inline]
__do_sys_unlink fs/namei.c:4266 [inline]
__se_sys_unlink fs/namei.c:4264 [inline]
__x64_sys_unlink+0xb1/0x110 fs/namei.c:4264
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Memory state around the buggy address:
ffff88804a17cf00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff88804a17cf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88804a17d000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff88804a17d080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff88804a17d100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 0f 87 d1 f8 14 05 ja 0x514f8d7
6: e8 62 1a 75 fd callq 0xfd751a6d
b: 4d 89 f7 mov %r14,%r15
e: 44 89 e9 mov %r13d,%ecx
11: 49 d3 ef shr %cl,%r15
14: 41 83 e7 3f and $0x3f,%r15d
18: 4a 8d 7c fb 28 lea 0x28(%rbx,%r15,8),%rdi
1d: 48 89 f8 mov %rdi,%rax
20: 48 c1 e8 03 shr $0x3,%rax
24: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1)
* 28: 0f 85 e4 00 00 00 jne 0x112 <-- trapping instruction
2e: 49 8d 47 04 lea 0x4(%r15),%rax
32: 4c 8b 64 c3 08 mov 0x8(%rbx,%rax,8),%r12
37: 4e 8d 7c fb 28 lea 0x28(%rbx,%r15,8),%r15
3c: 49 rex.WB
3d: 81 .byte 0x81