================================================================== BUG: KASAN: use-after-free in check_prev_add kernel/locking/lockdep.c:2298 [inline] BUG: KASAN: use-after-free in check_prevs_add kernel/locking/lockdep.c:2418 [inline] BUG: KASAN: use-after-free in validate_chain+0x1a35/0x84f0 kernel/locking/lockdep.c:2800 Write of size 8 at addr ffff88808aad9010 by task syz-executor.5/8294 CPU: 1 PID: 8294 Comm: syz-executor.5 Not tainted 5.2.0-rc7 #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Allocated by task 1172321806: (stack is not available) Freed by task 2287698888: BUG: unable to handle page fault for address: ffffffff8adeb628 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 8a70067 P4D 8a70067 PUD 8a71063 PMD 0 Thread overran stack, or stack corrupted Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8294 Comm: syz-executor.5 Not tainted 5.2.0-rc7 #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:stack_depot_fetch+0x7/0x30 lib/stackdepot.c:201 Code: 44 00 00 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 6a b2 fc fd 0f 0b e8 63 b2 fc fd 0f 0b 90 89 f8 25 ff ff 1f 00 <48> 8b 04 c5 30 b6 de 89 c1 ef 11 81 e7 f0 3f 00 00 48 8d 4c 38 18 RSP: 0018:ffff88808aad8a80 EFLAGS: 00010006 RAX: 00000000001fffff RBX: ffffea00022ab600 RCX: 1d0ba4c0d75a0f00 RDX: 0000000000000000 RSI: ffff88808aad8a88 RDI: 00000000ffffffff RBP: ffff88808aad8ac0 R08: ffffffff817fec39 R09: ffffed1015d644c6 R10: ffffed1015d644c6 R11: 1ffff11015d644c5 R12: ffff8880aa400ac0 R13: ffff88808aad91c0 R14: ffff88808aad9010 R15: ffff88808aad8dc0 FS: 0000555556ae5940(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8adeb628 CR3: 00000000a9bd6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Modules linked in: CR2: ffffffff8adeb628 ---[ end trace e93a18ba03f9a207 ]--- RIP: 0010:stack_depot_fetch+0x7/0x30 lib/stackdepot.c:201 Code: 44 00 00 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 6a b2 fc fd 0f 0b e8 63 b2 fc fd 0f 0b 90 89 f8 25 ff ff 1f 00 <48> 8b 04 c5 30 b6 de 89 c1 ef 11 81 e7 f0 3f 00 00 48 8d 4c 38 18 RSP: 0018:ffff88808aad8a80 EFLAGS: 00010006 RAX: 00000000001fffff RBX: ffffea00022ab600 RCX: 1d0ba4c0d75a0f00 RDX: 0000000000000000 RSI: ffff88808aad8a88 RDI: 00000000ffffffff RBP: ffff88808aad8ac0 R08: ffffffff817fec39 R09: ffffed1015d644c6 R10: ffffed1015d644c6 R11: 1ffff11015d644c5 R12: ffff8880aa400ac0 R13: ffff88808aad91c0 R14: ffff88808aad9010 R15: ffff88808aad8dc0 FS: 0000555556ae5940(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8adeb628 CR3: 00000000a9bd6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400