FAT-fs (loop1): bogus number of FAT structure
FAT-fs (loop1): Can't find a valid FAT filesystem
mac80211_hwsim hwsim17 wlan1: entered promiscuous mode
mac80211_hwsim hwsim17 wlan1: left promiscuous mode
------------[ cut here ]------------
WARNING: block/blk-mq-dma.c:309 at __blk_rq_map_sg+0x636/0x740, CPU#1: syz-executor.2/4069
Modules linked in:
CPU: 1 UID: 0 PID: 4069 Comm: syz-executor.2 Not tainted 6.19.0-rc4-next-20260108 #1 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:__blk_rq_map_sg+0x636/0x740
Code: ff ff e8 5d 20 30 ff b9 06 00 00 00 48 89 d8 48 8d bc 24 98 00 00 00 48 89 7c 24 20 f3 48 ab e9 fd fa ff ff e8 3b 20 30 ff 90 <0f> 0b 90 e9 f8 fd ff ff 48 89 cf e8 aa 6c 6e ff e9 66 fa ff ff 48
RSP: 0018:ffff88801fa56c80 EFLAGS: 00010212
RAX: 0000000000005c76 RBX: 0000000000000002 RCX: ffffc90007e3e000
RDX: 0000000000040000 RSI: ffffffff82455855 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000200 R14: ffff88800d724000 R15: ffff88801fa56e08
FS: 00007f2c04f7a700(0000) GS:ffff8880e544d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01101f000 CR3: 0000000017927000 CR4: 0000000000350ef0
Call Trace:
scsi_alloc_sgtables+0x206/0xc30
sd_init_command+0x8d8/0x30e0
scsi_queue_rq+0x133b/0x3280
blk_mq_dispatch_rq_list+0x3ad/0x1c00
__blk_mq_sched_dispatch_requests+0xc37/0x13e0
blk_mq_sched_dispatch_requests+0xd7/0x1b0
blk_mq_run_hw_queue+0x3bd/0x640
blk_mq_dispatch_list+0x4de/0x1580
blk_mq_flush_plug_list+0x12a/0x5b0
__blk_flush_plug+0x25c/0x460
blk_finish_plug+0x53/0xa0
__iomap_dio_rw+0x9b9/0x1c30
iomap_dio_rw+0x40/0xa0
ext4_file_write_iter+0x11eb/0x19f0
iter_file_splice_write+0xa3a/0x11c0
direct_splice_actor+0x192/0x7b0
splice_direct_to_actor+0x347/0x9d0
do_splice_direct+0x179/0x250
do_sendfile+0xa8e/0xdc0
__x64_sys_sendfile64+0x1d3/0x210
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c07a25b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2c04f7a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f2c07b39020 RCX: 00007f2c07a25b19
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00007f2c07a7ff6d R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffff50afcff R14: 00007f2c04f7a300 R15: 0000000000022000
irq event stamp: 2141
hardirqs last enabled at (2149): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (2160): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (2132): [] __irq_exit_rcu+0xc4/0x100
softirqs last disabled at (2127): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
kernel BUG at drivers/scsi/scsi_lib.c:1173!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 4069 Comm: syz-executor.2 Tainted: G W 6.19.0-rc4-next-20260108 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:scsi_alloc_sgtables+0xa32/0xc30
Code: e9 71 f7 ff ff e8 de 0c 32 fe 90 0f 0b 90 41 bc 0a 00 00 00 e9 c8 fc ff ff 41 bc 09 00 00 00 e9 bd fc ff ff e8 bf 0c 32 fe 90 <0f> 0b 45 31 f6 e9 b7 f9 ff ff e8 af 0c 32 fe be 01 00 00 00 31 ff
RSP: 0018:ffff88801fa56dc0 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff88800d7240f8 RCX: ffffc90007e3e000
RDX: 0000000000040000 RSI: ffffffff83436bd1 RDI: 0000000000000004
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88800d72401c R14: 0000000000000000 R15: 0000000000000000
FS: 00007f2c04f7a700(0000) GS:ffff8880e544d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01101f000 CR3: 0000000017927000 CR4: 0000000000350ef0
Call Trace:
sd_init_command+0x8d8/0x30e0
scsi_queue_rq+0x133b/0x3280
blk_mq_dispatch_rq_list+0x3ad/0x1c00
__blk_mq_sched_dispatch_requests+0xc37/0x13e0
blk_mq_sched_dispatch_requests+0xd7/0x1b0
blk_mq_run_hw_queue+0x3bd/0x640
blk_mq_dispatch_list+0x4de/0x1580
blk_mq_flush_plug_list+0x12a/0x5b0
__blk_flush_plug+0x25c/0x460
blk_finish_plug+0x53/0xa0
__iomap_dio_rw+0x9b9/0x1c30
iomap_dio_rw+0x40/0xa0
ext4_file_write_iter+0x11eb/0x19f0
iter_file_splice_write+0xa3a/0x11c0
direct_splice_actor+0x192/0x7b0
splice_direct_to_actor+0x347/0x9d0
do_splice_direct+0x179/0x250
do_sendfile+0xa8e/0xdc0
__x64_sys_sendfile64+0x1d3/0x210
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c07a25b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2c04f7a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f2c07b39020 RCX: 00007f2c07a25b19
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00007f2c07a7ff6d R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffff50afcff R14: 00007f2c04f7a300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:scsi_alloc_sgtables+0xa32/0xc30
Code: e9 71 f7 ff ff e8 de 0c 32 fe 90 0f 0b 90 41 bc 0a 00 00 00 e9 c8 fc ff ff 41 bc 09 00 00 00 e9 bd fc ff ff e8 bf 0c 32 fe 90 <0f> 0b 45 31 f6 e9 b7 f9 ff ff e8 af 0c 32 fe be 01 00 00 00 31 ff
RSP: 0018:ffff88801fa56dc0 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff88800d7240f8 RCX: ffffc90007e3e000
RDX: 0000000000040000 RSI: ffffffff83436bd1 RDI: 0000000000000004
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88800d72401c R14: 0000000000000000 R15: 0000000000000000
FS: 00007f2c04f7a700(0000) GS:ffff8880e544d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01101f000 CR3: 0000000017927000 CR4: 0000000000350ef0
------------[ cut here ]------------
WARNING: kernel/exit.c:902 at do_exit+0x1c21/0x2950, CPU#1: syz-executor.2/4069
Modules linked in:
CPU: 1 UID: 0 PID: 4069 Comm: syz-executor.2 Tainted: G D W 6.19.0-rc4-next-20260108 #1 PREEMPT(voluntary)
Tainted: [D]=DIE, [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:do_exit+0x1c21/0x2950
Code: 37 0a 00 00 c7 43 18 00 00 00 00 e9 36 e6 ff ff e8 b4 d4 39 00 bf 02 24 00 00 e8 3a 7f 0b 00 e9 41 ff ff ff e8 a0 d4 39 00 90 <0f> 0b 90 e9 9c e4 ff ff e8 92 d4 39 00 4c 89 e6 bf 05 06 00 00 e8
RSP: 0018:ffff88801fa57e40 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000200 RCX: ffffc90007e3e000
RDX: 0000000000040000 RSI: ffffffff813ba3f0 RDI: ffff888013fa11c0
RBP: ffff888013fa0000 R08: 0000000000000001 R09: fffffbfff0f640d8
R10: 0000000000000200 R11: 0000000000000001 R12: 000000000000000b
R13: 0000000000002710 R14: ffff888013fa1688 R15: ffff888013fa0000
FS: 00007f2c04f7a700(0000) GS:ffff8880e544d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01101f000 CR3: 0000000017927000 CR4: 0000000000350ef0
Call Trace:
make_task_dead+0x174/0x3b0
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7f2c07a25b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2c04f7a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f2c07b39020 RCX: 00007f2c07a25b19
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00007f2c07a7ff6d R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffff50afcff R14: 00007f2c04f7a300 R15: 0000000000022000
irq event stamp: 2221
hardirqs last enabled at (2221): [] do_error_trap+0x210/0x240
hardirqs last disabled at (2220): [] exc_invalid_op+0x51/0x80
softirqs last enabled at (2132): [] __irq_exit_rcu+0xc4/0x100
softirqs last disabled at (2127): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:591
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 4069, name: syz-executor.2
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
INFO: lockdep is turned off.
CPU: 1 UID: 0 PID: 4069 Comm: syz-executor.2 Tainted: G D W 6.19.0-rc4-next-20260108 #1 PREEMPT(voluntary)
Tainted: [D]=DIE, [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
__might_resched+0x2f3/0x510
__mutex_lock+0xc0/0x2380
sched_mm_cid_exit+0x9a/0x450
do_exit+0x2db/0x2950
make_task_dead+0x174/0x3b0
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7f2c07a25b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2c04f7a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f2c07b39020 RCX: 00007f2c07a25b19
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00007f2c07a7ff6d R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffff50afcff R14: 00007f2c04f7a300 R15: 0000000000022000
loop7: detected capacity change from 0 to 360
loop1: detected capacity change from 0 to 64
loop7: detected capacity change from 0 to 360
==================================================================
BUG: KASAN: slab-use-after-free in rwsem_down_write_slowpath+0x1522/0x1670
Read of size 4 at addr ffff888013fa0034 by task syz-executor.2/4089
CPU: 1 UID: 0 PID: 4089 Comm: syz-executor.2 Tainted: G D W 6.19.0-rc4-next-20260108 #1 PREEMPT(voluntary)
Tainted: [D]=DIE, [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xca/0x120
print_report+0xcb/0x610
kasan_report+0xca/0x100
rwsem_down_write_slowpath+0x1522/0x1670
down_write_killable+0x1df/0x230
do_truncate+0x12c/0x220
path_openat+0x2560/0x2d60
do_filp_open+0x1e8/0x450
do_sys_openat2+0x107/0x250
__x64_sys_creat+0xcc/0x120
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c07a25b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2c04f59188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f2c07b390e0 RCX: 00007f2c07a25b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000300
RBP: 00007f2c07a7ff6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffff50afcff R14: 00007f2c04f59300 R15: 0000000000022000
loop1: detected capacity change from 0 to 64
Allocated by task 4060:
kasan_save_stack+0x24/0x50
kasan_save_track+0x14/0x30
__kasan_slab_alloc+0x59/0x70
FAT-fs (loop1): bogus number of FAT structure
kmem_cache_alloc_node_noprof+0x227/0x780
copy_process+0x460/0x7120
kernel_clone+0xea/0x7c0
__do_sys_clone+0xce/0x120
do_syscall_64+0xbf/0x420
FAT-fs (loop1): Can't find a valid FAT filesystem
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 22:
kasan_save_stack+0x24/0x50
kasan_save_track+0x14/0x30
kasan_save_free_info+0x3a/0x60
__kasan_slab_free+0x43/0x70
kmem_cache_free+0x2cd/0x660
rcu_core+0x543/0x1b30
handle_softirqs+0x1b1/0x7d0
run_ksoftirqd+0x2e/0x60
smpboot_thread_fn+0x41d/0x9d0
kthread+0x385/0x490
ret_from_fork+0x67a/0x7a0
ret_from_fork_asm+0x1a/0x30
Last potentially related work creation:
kasan_save_stack+0x24/0x50
kasan_record_aux_stack+0x89/0xa0
__call_rcu_common.constprop.0+0x70/0xad0
delayed_put_task_struct+0xde/0x230
rcu_core+0x543/0x1b30
handle_softirqs+0x1b1/0x7d0
run_ksoftirqd+0x2e/0x60
smpboot_thread_fn+0x41d/0x9d0
kthread+0x385/0x490
ret_from_fork+0x67a/0x7a0
ret_from_fork_asm+0x1a/0x30
Second to last potentially related work creation:
kasan_save_stack+0x24/0x50
kasan_record_aux_stack+0x89/0xa0
__call_rcu_common.constprop.0+0x70/0xad0
put_task_struct_rcu_user+0x75/0xc0
__schedule+0xfea/0x4690
__cond_resched+0x4c/0x80
down_read+0x79/0x450
kernfs_iop_permission+0x70/0xc0
inode_permission+0x3f4/0x630
link_path_walk+0x1494/0x1c80
path_lookupat+0x70/0xc10
path_openat+0x1c71/0x2d60
do_filp_open+0x1e8/0x450
do_sys_openat2+0x107/0x250
__x64_sys_openat+0x142/0x200
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888013fa0000
which belongs to the cache task_struct of size 6784
The buggy address is located 52 bytes inside of
freed 6784-byte region [ffff888013fa0000, ffff888013fa1a80)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888013fa3700 pfn:0x13fa0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88800deb0fc1
flags: 0x100000000000240(workingset|head|node=0|zone=1)
page_type: f5(slab)
raw: 0100000000000240 ffff888009814640 ffffea00002ff210 ffffea0001268c10
raw: ffff888013fa3700 0000000000040003 00000000f5000000 ffff88800deb0fc1
head: 0100000000000240 ffff888009814640 ffffea00002ff210 ffffea0001268c10
head: ffff888013fa3700 0000000000040003 00000000f5000000 ffff88800deb0fc1
head: 0100000000000003 ffffea00004fe801 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888013f9ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888013f9ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888013fa0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888013fa0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888013fa0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
loop7: detected capacity change from 0 to 360
loop7: detected capacity change from 0 to 360