====================================== | [ 85.707903][ T50] ================================================================== | [ 85.708216][ T50] BUG: KASAN: use-after-free in page_pool_item_uninit (net/core/page_pool.c:523) | [ 85.708428][ T50] Read of size 8 at addr ffff88800ca28008 by task kworker/2:1/50 | [ 85.708631][ T50] [ 85.708953][ T50] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 85.709129][ T50] Workqueue: events page_pool_release_retry [ 85.709308][ T50] Call Trace: [ 85.709414][ T50] [ 85.709489][ T50] dump_stack_lvl (lib/dump_stack.c:123) [ 85.709638][ T50] print_address_description.constprop.0 (mm/kasan/report.c:379) [ 85.709819][ T50] ? page_pool_item_uninit (net/core/page_pool.c:523) [ 85.709962][ T50] print_report (mm/kasan/report.c:490) [ 85.710102][ T50] ? kasan_addr_to_slab (./include/linux/mm.h:1295 mm/kasan/../slab.h:211 mm/kasan/common.c:38) [ 85.710246][ T50] kasan_report (mm/kasan/report.c:604) [ 85.710352][ T50] ? page_pool_item_uninit (net/core/page_pool.c:523) [ 85.710492][ T50] page_pool_item_uninit (net/core/page_pool.c:523) [ 85.710634][ T50] page_pool_release (net/core/page_pool.c:1431 net/core/page_pool.c:1484) [ 85.710769][ T50] ? __pfx_page_pool_release (net/core/page_pool.c:1478) [ 85.710907][ T50] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 85.711049][ T50] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 85.711186][ T50] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 85.711322][ T50] page_pool_release_retry (net/core/page_pool.c:1497) [ 85.711455][ T50] ? trace_workqueue_execute_start (./include/trace/events/workqueue.h:84 (discriminator 37)) [ 85.711634][ T50] process_one_work (kernel/workqueue.c:3229) [ 85.711780][ T50] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 85.711918][ T50] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 85.712055][ T50] ? assign_work (kernel/workqueue.c:1200) [ 85.712192][ T50] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 85.712330][ T50] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 85.712502][ T50] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 85.712636][ T50] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 85.712775][ T50] kthread (kernel/kthread.c:389) [ 85.712883][ T50] ? __pfx_kthread (kernel/kthread.c:342) [ 85.713021][ T50] ret_from_fork (arch/x86/kernel/process.c:147) [ 85.713163][ T50] ? __pfx_kthread (kernel/kthread.c:342) [ 85.713308][ T50] ret_from_fork_asm (arch/x86/entry/entry_64.S:257) | [ 85.716533][ T50] Disabling lock debugging due to kernel taint | [ 85.716737][ T50] Oops: general protection fault, probably for non-canonical address 0xf99995999999999c: 0000 [#1] PREEMPT SMP KASAN NOPTI | [ 85.717088][ T50] KASAN: maybe wild-memory-access in range [0xcccccccccccccce0-0xcccccccccccccce7] | [ 85.717594][ T50] Tainted: [B]=BAD_PAGE [ 85.717699][ T50] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 85.717870][ T50] Workqueue: events page_pool_release_retry [ 85.718046][ T50] RIP: 0010:page_pool_item_uninit (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/refcount.h:136 net/core/page_pool.c:524) [ 85.718222][ T50] Code: 8d 48 bb 00 00 00 00 00 fc ff df 48 c1 ed 03 48 01 dd 4d 8d 75 1c be 04 00 00 00 4c 89 f7 e8 ad 6d 63 fe 4c 89 f0 48 c1 e8 03 <0f> b6 14 18 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 62 41 All code ======== 0: 8d 48 bb lea -0x45(%rax),%ecx 3: 00 00 add %al,(%rax) 5: 00 00 add %al,(%rax) 7: 00 fc add %bh,%ah 9: ff (bad) a: df 48 c1 fisttps -0x3f(%rax) d: ed in (%dx),%eax e: 03 48 01 add 0x1(%rax),%ecx 11: dd 4d 8d fisttpll -0x73(%rbp) 14: 75 1c jne 0x32 16: be 04 00 00 00 mov $0x4,%esi 1b: 4c 89 f7 mov %r14,%rdi 1e: e8 ad 6d 63 fe call 0xfffffffffe636dd0 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax 2a:* 0f b6 14 18 movzbl (%rax,%rbx,1),%edx <-- trapping instruction 2e: 4c 89 f0 mov %r14,%rax 31: 83 e0 07 and $0x7,%eax 34: 83 c0 03 add $0x3,%eax 37: 38 d0 cmp %dl,%al 39: 7c 04 jl 0x3f 3b: 84 d2 test %dl,%dl 3d: 75 62 jne 0xa1 3f: 41 rex.B Code starting with the faulting instruction =========================================== 0: 0f b6 14 18 movzbl (%rax,%rbx,1),%edx 4: 4c 89 f0 mov %r14,%rax 7: 83 e0 07 and $0x7,%eax a: 83 c0 03 add $0x3,%eax d: 38 d0 cmp %dl,%al f: 7c 04 jl 0x15 11: 84 d2 test %dl,%dl 13: 75 62 jne 0x77 15: 41 rex.B [ 85.718799][ T50] RSP: 0018:ffffc9000036fbc0 EFLAGS: 00010a06 [ 85.719034][ T50] RAX: 199999999999999c RBX: dffffc0000000000 RCX: ffffffff8c09f6e3 [ 85.719237][ T50] RDX: 0000000000000000 RSI: 0000000000000004 RDI: cccccccccccccce0 [ 85.719442][ T50] RBP: fffffbfff1ae4c78 R08: 0000000000000000 R09: fffffbfff1ebf688 [ 85.719709][ T50] R10: ffffffff8f5fb447 R11: 205d303554202020 R12: ffff88800af8e620 [ 85.719913][ T50] R13: ccccccccccccccc4 R14: cccccccccccccce0 R15: ffffea00004229c0 [ 85.720117][ T50] FS: 0000000000000000(0000) GS:ffff88806d100000(0000) knlGS:0000000000000000 [ 85.720419][ T50] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.720591][ T50] CR2: 00007fe7dff662f0 CR3: 000000000cef8006 CR4: 0000000000772ef0 [ 85.720865][ T50] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.721071][ T50] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.721274][ T50] PKRU: 55555554 [ 85.721439][ T50] Call Trace: [ 85.721540][ T50] [ 85.721613][ T50] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) [ 85.721722][ T50] ? exc_general_protection (arch/x86/kernel/traps.c:751 arch/x86/kernel/traps.c:693) [ 85.721863][ T50] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:617) [ 85.722071][ T50] ? page_pool_item_uninit (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/refcount.h:136 net/core/page_pool.c:524) [ 85.722208][ T50] ? page_pool_item_uninit (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/refcount.h:136 net/core/page_pool.c:524) [ 85.722343][ T50] page_pool_release (net/core/page_pool.c:1431 net/core/page_pool.c:1484) [ 85.722482][ T50] ? __pfx_page_pool_release (net/core/page_pool.c:1478) [ 85.722681][ T50] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 85.722819][ T50] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 85.722959][ T50] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 85.723100][ T50] page_pool_release_retry (net/core/page_pool.c:1497) [ 85.723299][ T50] ? trace_workqueue_execute_start (./include/trace/events/workqueue.h:84 (discriminator 37)) [ 85.723467][ T50] process_one_work (kernel/workqueue.c:3229) [ 85.723610][ T50] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 85.723748][ T50] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 85.723959][ T50] ? assign_work (kernel/workqueue.c:1200) [ 85.724096][ T50] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 85.724231][ T50] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 85.724397][ T50] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 85.724597][ T50] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 85.724730][ T50] kthread (kernel/kthread.c:389) [ 85.724833][ T50] ? __pfx_kthread (kernel/kthread.c:342) [ 85.724970][ T50] ret_from_fork (arch/x86/kernel/process.c:147) [ 85.725180][ T50] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: page_pool_item_uninit:page_pool_release:page_pool_release_retry:process_one_work:worker_thread print_report:kasan_report:page_pool_item_uninit:page_pool_release:page_pool_release_retry