================================================================== BUG: KASAN: slab-out-of-bounds in __lock_acquire+0x2eff/0x3640 kernel/locking/lockdep.c:3224 at addr ffff8801cf9ddff8 Read of size 8 by task syz-executor2/12744 CPU: 1 PID: 12744 Comm: syz-executor2 Not tainted 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d1c5f810 ffffffff81d90889 ffff8801d77ff780 ffff8801cf9ddf80 ffff8801cf9ddfe0 ffffed0039f3bbff ffff8801cf9ddff8 ffff8801d1c5f838 ffffffff8153a44c ffffed0039f3bbff ffff8801d77ff780 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:330 [inline] [] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330 [] __lock_acquire+0x2eff/0x3640 kernel/locking/lockdep.c:3224 [] lock_acquire+0x12e/0x410 kernel/locking/lockdep.c:3756 [] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:186 [inline] [] _raw_write_lock_irqsave+0x4e/0x62 kernel/locking/spinlock.c:303 [] sg_remove_request+0x70/0x120 drivers/scsi/sg.c:2122 [] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1838 [] sg_read+0xa1c/0x1440 drivers/scsi/sg.c:527 [] __vfs_read+0x103/0x670 fs/read_write.c:452 [] vfs_read+0x11e/0x380 fs/read_write.c:475 [] SYSC_read fs/read_write.c:591 [inline] [] SyS_read+0xd9/0x1b0 fs/read_write.c:584 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cf9ddf80, in cache fasync_cache size: 96 Allocated: PID = 12744 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:537 slab_post_alloc_hook mm/slab.h:417 [inline] slab_alloc_node mm/slub.c:2715 [inline] slab_alloc mm/slub.c:2723 [inline] kmem_cache_alloc+0xba/0x290 mm/slub.c:2728 fasync_alloc fs/fcntl.c:604 [inline] fasync_add_entry fs/fcntl.c:662 [inline] fasync_helper+0x37/0xb0 fs/fcntl.c:691 sg_fasync+0x86/0xb0 drivers/scsi/sg.c:1203 setfl fs/fcntl.c:70 [inline] do_fcntl fs/fcntl.c:267 [inline] SYSC_fcntl fs/fcntl.c:372 [inline] SyS_fcntl+0x658/0xc70 fs/fcntl.c:357 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 0 (stack is not available) Memory state around the buggy address: ffff8801cf9dde80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff8801cf9ddf00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff8801cf9ddf80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ^ ffff8801cf9de000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801cf9de080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ================================================================== BUG: KASAN: slab-out-of-bounds in debug_write_lock_before kernel/locking/spinlock_debug.c:178 [inline] at addr ffff8801cf9ddfe8 BUG: KASAN: slab-out-of-bounds in do_raw_write_lock+0x1a3/0x1d0 kernel/locking/spinlock_debug.c:202 at addr ffff8801cf9ddfe8 Read of size 4 by task syz-executor2/12744 CPU: 1 PID: 12744 Comm: syz-executor2 Tainted: G B 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d1c5fa28 ffffffff81d90889 ffff8801d77ff780 ffff8801cf9ddf80 ffff8801cf9ddfe0 ffffed0039f3bbfd ffff8801cf9ddfe8 ffff8801d1c5fa50 ffffffff8153a44c ffffed0039f3bbfd ffff8801d77ff780 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:329 [inline] [] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:329 [] debug_write_lock_before kernel/locking/spinlock_debug.c:178 [inline] [] do_raw_write_lock+0x1a3/0x1d0 kernel/locking/spinlock_debug.c:202 [] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:187 [inline] [] _raw_write_lock_irqsave+0x56/0x62 kernel/locking/spinlock.c:303 [] sg_remove_request+0x70/0x120 drivers/scsi/sg.c:2122 [] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1838 [] sg_read+0xa1c/0x1440 drivers/scsi/sg.c:527 [] __vfs_read+0x103/0x670 fs/read_write.c:452 [] vfs_read+0x11e/0x380 fs/read_write.c:475 [] SYSC_read fs/read_write.c:591 [inline] [] SyS_read+0xd9/0x1b0 fs/read_write.c:584 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cf9ddf80, in cache fasync_cache size: 96 Allocated: PID = 12744 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 12744 Comm: syz-executor2 Tainted: G B 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801a70fe000 task.stack: ffff8801d1c58000 RIP: 0010:[] [] __sanitizer_cov_trace_pc+0x2d/0x60 kernel/kcov.c:88 RSP: 0018:ffff8801d1c5f6d0 EFLAGS: 00010046 RAX: 0000000000010000 RBX: ffffffff83a6e760 RCX: ffffc900031fa000 RDX: 0000000000010000 RSI: ffff8801d1c5f790 RDI: 0000000000000007 RBP: ffff8801d1c5f718 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8801d1c5f790 R13: ffffffff83a6e760 R14: ffffffff83a6e761 R15: ffff8801d1c5f790 FS: 00007fe0ed4df700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0c582f6000 CR3: 00000001c2127000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: 2a00000041b58ab3 ffff8801d1c5f797 ffffffff83a6e760 ffffffff83a6e761 ffffffff858a56e0 00000000000003e0 ffff8801d1c5f7d0 ffffffff83a6e760 ffff8801d1c5f790 ffff8801d1c5f7f8 ffffffff81dbb1a6 00000000038fdbd9 Call Trace: [] vsnprintf+0x156/0x16d0 lib/vsprintf.c:1996 [] vscnprintf+0x2d/0x60 lib/vsprintf.c:2147 [] vprintk_emit+0xf1/0x750 kernel/printk/printk.c:1847 [] vprintk+0x28/0x30 kernel/printk/printk.c:1913 [] vprintk_default+0x1d/0x30 kernel/printk/printk.c:1914 [] vprintk_func kernel/printk/internal.h:36 [inline] [] printk+0xb7/0xe2 kernel/printk/printk.c:1975 [] print_stack_trace+0xf8/0x130 kernel/stacktrace.c:22 [] print_track+0x44/0x6d mm/slub.c:569 [] kasan_object_err+0x53/0x70 mm/kasan/report.c:168 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:329 [inline] [] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:329 [] debug_write_lock_before kernel/locking/spinlock_debug.c:178 [inline] [] do_raw_write_lock+0x1a3/0x1d0 kernel/locking/spinlock_debug.c:202 [] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:187 [inline] [] _raw_write_lock_irqsave+0x56/0x62 kernel/locking/spinlock.c:303 [] sg_remove_request+0x70/0x120 drivers/scsi/sg.c:2122 [] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1838 [] sg_read+0xa1c/0x1440 drivers/scsi/sg.c:527 [] __vfs_read+0x103/0x670 fs/read_write.c:452 [] vfs_read+0x11e/0x380 fs/read_write.c:475 [] SYSC_read fs/read_write.c:591 [inline] [] SyS_read+0xd9/0x1b0 fs/read_write.c:584 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Code: 48 8b 04 25 40 55 01 00 48 85 c0 48 89 e5 74 1a 65 8b 15 f7 d2 ca 7e 81 e2 00 01 1f 00 75 0b 8b 90 68 12 00 00 83 fa 01 74 02 5d 48 8b 88 70 12 00 00 8b 80 6c 12 00 00 48 8b 11 48 83 c2 01 RIP [] __sanitizer_cov_trace_pc+0x2d/0x60 kernel/kcov.c:88 RSP ---[ end trace 8c525009cb509632 ]---