ip: ffff888045fe33a0: ffffffff ffffffff 9a4be670 ffffffff ip: ffff888045fe33b0: 93e45c48 ffffffff 00000000 00000000 ip: ffff888045fe33c0: 8bde8500 ffffffff 00000300 00000000 ip: ffff888045fe33d0: 00000000 00000000 00000000 00000000 ip: ffff888045fe33e0: 00000000 00000000 00000000 dead4ead ip: ffff888045fe33f0: ffffffff 00000000 ffffffff ffffffff ip: ffff888045fe3400: 933fc320 ffffffff 00000000 00000000 ip: ffff888045fe3410: 00000000 00000000 8bcce680 ffffffff ip: ffff888045fe3420: 00000200 00000000 00000000 00000000 ip: ffff888045fe3430: 45fe33d0 ffff8880 9a4be660 ffffffff ip: ffff888045fe3440: 00000000 00000000 00000000 00000000 ip: ffff888045fe3450: 8bde84c0 ffffffff 00000400 00000000 ip: ffff888045fe3460: 45fe3460 ffff8880 45fe3460 ffff8880 ip: ffff888045fe3470: 00000000 00000000 00000000 00000000 ip: ffff888045fe3480: 00000000 00000000 00000000 00000000 mp: ffff8880003575d0: 00001000 0000000b 000039dc 00000000 mp: ffff8880003575e0: 00e49340 ffffc900 00357ca8 ffff8880 mp: ffff8880003575f0: 00000005 00000000 00000001 00000000 mp: ffff888000357600: 3eb91000 ffff8880 0000072c 00000000 mp: ffff888000357610: 00000000 dead4ead ffffffff 00000000 mp: ffff888000357620: ffffffff ffffffff 9a5b4600 ffffffff mp: ffff888000357630: 93e87bc0 ffffffff 00000000 00000000 mp: ffff888000357640: 8c0c14e0 ffffffff 00000300 00000000 mp: ffff888000357650: 00357650 ffff8880 00357650 ffff8880 mp: ffff888000357660: 00fae440 ffffea00 12f3e000 ffff8880 mp: ffff888000357670: 00001000 00003d78 00000001 00000000 mp: ffff888000357680: 41d4b000 ffff8880 Locker's tblock: ffffc90000e49000: 00000000 00000000 00000000 00000000 Locker's tblock: ffffc90000e49010: 00e49010 ffffc900 00e49010 ffffc900 Locker's tblock: ffffc90000e49020: 00000000 00000000 00000000 00000000 Locker's tblock: ffffc90000e49030: 00000000 dead4ead ffffffff 00000000 Locker's tblock: ffffc90000e49040: ffffffff ffffffff 9a5b4800 ffffffff Locker's tblock: ffffc90000e49050: 00000000 00000000 00000000 00000000 Locker's tblock: ffffc90000e49060: 8c0c29a0 ffffffff 00000300 00000000 Locker's tblock: ffffc90000e49070: 00e49070 ffffc900 00e49070 ffffc900 Locker's tblock: ffffc90000e49080: 00000000 00000000 00000000 00000000 Locker's tblock: ffffc90000e49090: 00000000 00000000 00000000 00000000 Locker's tblock: ffffc90000e490a0: 00000000 00000000 00000000 00000000 Locker's tblock: ffffc90000e490b0: 00000000 dead4ead ffffffff 00000000 Locker's tblock: ffffc90000e490c0: ffffffff ffffffff 9a5b47e0 ffffffff Locker's tblock: ffffc90000e490d0: 00000000 00000000 00000000 00000000 Locker's tblock: ffffc90000e490e0: 8c0c2960 ffffffff 00000300 00000000 Locker's tblock: ffffc90000e490f0: 00e490f0 ffffc900 00e490f0 ffffc900 Locker's tblock: ffffc90000e49100: 00000000 00000000 00000000 00000000 Tlock: ffffc90000fe6318: 0003000c 80018804 003575d0 ffff8880 Tlock: ffffc90000fe6328: 45fe4200 ffff8880 01140000 07002000 Tlock: ffffc90000fe6338: 00000104 00000000 00000000 00000000 Tlock: ffffc90000fe6348: 00000000 00000000 00000000 00000000 Tlock: ffffc90000fe6358: 00000000 00000000 ------------[ cut here ]------------ kernel BUG at fs/jfs/jfs_txnmgr.c:836! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5335 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:txLock+0x1c7a/0x1cc0 fs/jfs/jfs_txnmgr.c:836 Code: 48 c7 c6 c0 2f 0c 8c ba 01 00 00 00 b9 10 00 00 00 41 b8 04 00 00 00 4c 8b 4c 24 30 6a 00 6a 48 e8 4b 4c 4f 01 48 83 c4 10 90 <0f> 0b e8 3f 19 61 fe 4c 89 ff 48 c7 c6 a0 37 0c 8c e8 f0 60 c3 fd RSP: 0018:ffffc90006ba5c60 EFLAGS: 00010286 RAX: b3cf19dd7d236a00 RBX: dffffc0000000000 RCX: ffff88800036a540 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90006ba5d88 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1cfd230 R12: 0000000000000010 R13: dffffc0000000000 R14: 1ffff920001fcc63 R15: ffffc90000fe631a FS: 00007fa2ea8bc6c0(0000) GS:ffff88808c891000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa2e9b834b0 CR3: 000000003386c000 CR4: 0000000000352ef0 Call Trace: xtSplitRoot+0x6d5/0x1010 fs/jfs/jfs_xtree.c:1297 xtSplitUp+0x35b/0x1fc0 fs/jfs/jfs_xtree.c:785 xtInsert+0x452/0xf20 fs/jfs/jfs_xtree.c:608 extAlloc+0xad9/0x1020 fs/jfs/jfs_extent.c:150 jfs_get_block+0x358/0xad0 fs/jfs/inode.c:254 __block_write_begin_int+0x6c6/0x1910 fs/buffer.c:2042 block_write_begin+0x8d/0x120 fs/buffer.c:2153 jfs_write_begin+0x35/0x80 fs/jfs/inode.c:306 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4325 generic_file_write_iter+0x14a/0x680 mm/filemap.c:4468 __kernel_write_iter+0x41e/0x880 fs/read_write.c:621 dump_emit_page fs/coredump.c:1304 [inline] dump_user_range+0xc19/0x12c0 fs/coredump.c:1378 elf_core_dump+0x34c2/0x3ad0 fs/binfmt_elf.c:2109 coredump_write+0x12b0/0x19d0 fs/coredump.c:1053 do_coredump fs/coredump.c:1132 [inline] vfs_coredump+0x3807/0x4530 fs/coredump.c:1206 get_signal+0x1107/0x1330 kernel/signal.c:3022 arch_do_signal_or_restart+0xbc/0x840 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop kernel/entry/common.c:98 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline] irqentry_exit+0x2aa/0x8b0 kernel/entry/common.c:162 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fa2e999ce61 Code: 00 00 00 00 0f 1f 44 00 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 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:0000000000000020 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fa2e9c15fa0 RCX: 00007fa2e999ce59 RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000020000 RBP: 00007fa2e9a32d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007fa2e9c16038 R14: 00007fa2e9c15fa0 R15: 00007ffe5d53e9b8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:txLock+0x1c7a/0x1cc0 fs/jfs/jfs_txnmgr.c:836 Code: 48 c7 c6 c0 2f 0c 8c ba 01 00 00 00 b9 10 00 00 00 41 b8 04 00 00 00 4c 8b 4c 24 30 6a 00 6a 48 e8 4b 4c 4f 01 48 83 c4 10 90 <0f> 0b e8 3f 19 61 fe 4c 89 ff 48 c7 c6 a0 37 0c 8c e8 f0 60 c3 fd RSP: 0018:ffffc90006ba5c60 EFLAGS: 00010286 RAX: b3cf19dd7d236a00 RBX: dffffc0000000000 RCX: ffff88800036a540 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90006ba5d88 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1cfd230 R12: 0000000000000010 R13: dffffc0000000000 R14: 1ffff920001fcc63 R15: ffffc90000fe631a FS: 00007fa2ea8bc6c0(0000) GS:ffff88808c891000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa2e9b834b0 CR3: 000000003386c000 CR4: 0000000000352ef0