loop1: detected capacity change from 0 to 32768 overlayfs: upper fs needs to support d_type. overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. general protection fault, probably for non-canonical address 0xdffffc00000000ba: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000005d0-0x00000000000005d7] CPU: 1 PID: 4271 Comm: syz.1.9 Not tainted 5.15.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:blkg_tryget_closest block/blk-cgroup.c:1832 [inline] RIP: 0010:bio_associate_blkg_from_css+0x293/0x960 block/blk-cgroup.c:1866 Code: c1 e8 03 80 3c 28 00 74 08 4c 89 f7 e8 46 dd c8 fd bd d0 05 00 00 49 03 2e 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 1f dd c8 fd bb 90 00 00 00 48 03 5d RSP: 0018:ffffc900031cf050 EFLAGS: 00010202 RAX: 00000000000000ba RBX: 0000000000000001 RCX: dffffc0000000000 RDX: ffffc90005b89000 RSI: 000000000003614a RDI: 000000000003614b RBP: 00000000000005d0 R08: ffffffff8401affb R09: fffffbfff2131e19 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807949c000 R13: ffff88802b03c500 R14: ffff88802b03c508 R15: ffff88801f049dec FS: 00007f9bef5c96c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9bef5c7fb8 CR3: 00000000756bf000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bio_associate_blkg+0x220/0x330 block/blk-cgroup.c:1894 lbmStartIO+0x207/0x4b0 fs/jfs/jfs_logmgr.c:2130 lbmWrite+0x379/0x4a0 fs/jfs/jfs_logmgr.c:2079 lmNextPage+0x712/0xa60 fs/jfs/jfs_logmgr.c:-1 lmWriteRecord+0xe5d/0x12e0 fs/jfs/jfs_logmgr.c:537 lmLog+0x792/0xab0 fs/jfs/jfs_logmgr.c:314 mapLog fs/jfs/jfs_txnmgr.c:2142 [inline] txLog fs/jfs/jfs_txnmgr.c:1408 [inline] txCommit+0x115d/0x6ba0 fs/jfs/jfs_txnmgr.c:1264 __jfs_xattr_set+0x124/0x180 fs/jfs/xattr.c:938 __vfs_removexattr+0x3ce/0x410 fs/xattr.c:470 __vfs_removexattr_locked+0x1fe/0x410 fs/xattr.c:505 vfs_removexattr+0xff/0x2a0 fs/xattr.c:527 ovl_do_removexattr fs/overlayfs/overlayfs.h:231 [inline] ovl_removexattr fs/overlayfs/overlayfs.h:239 [inline] ovl_make_workdir fs/overlayfs/super.c:1443 [inline] ovl_get_workdir+0xb25/0x1370 fs/overlayfs/super.c:1526 ovl_fill_super+0x1b85/0x2a20 fs/overlayfs/super.c:2082 mount_nodev+0x52/0xe0 fs/super.c:1446 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x2ba/0xb40 fs/namespace.c:3012 do_mount fs/namespace.c:3355 [inline] __do_sys_mount fs/namespace.c:3563 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f9bf1760169 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9bef5c9038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f9bf1978fa0 RCX: 00007f9bf1760169 RDX: 0000200000000000 RSI: 0000200000000080 RDI: 0000000000000000 RBP: 00007f9bf17e12a0 R08: 00002000000002c0 R09: 0000000000000000 R10: 0000000000010000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f9bf1978fa0 R15: 00007ffff0f54858 Modules linked in: ---[ end trace 696f08970d9fa114 ]--- RIP: 0010:blkg_tryget_closest block/blk-cgroup.c:1832 [inline] RIP: 0010:bio_associate_blkg_from_css+0x293/0x960 block/blk-cgroup.c:1866 Code: c1 e8 03 80 3c 28 00 74 08 4c 89 f7 e8 46 dd c8 fd bd d0 05 00 00 49 03 2e 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 1f dd c8 fd bb 90 00 00 00 48 03 5d RSP: 0018:ffffc900031cf050 EFLAGS: 00010202 RAX: 00000000000000ba RBX: 0000000000000001 RCX: dffffc0000000000 RDX: ffffc90005b89000 RSI: 000000000003614a RDI: 000000000003614b RBP: 00000000000005d0 R08: ffffffff8401affb R09: fffffbfff2131e19 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807949c000 R13: ffff88802b03c500 R14: ffff88802b03c508 R15: ffff88801f049dec FS: 00007f9bef5c96c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005652847ad000 CR3: 00000000756bf000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c1 e8 03 shr $0x3,%eax 3: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 7: 74 08 je 0x11 9: 4c 89 f7 mov %r14,%rdi c: e8 46 dd c8 fd call 0xfdc8dd57 11: bd d0 05 00 00 mov $0x5d0,%ebp 16: 49 03 2e add (%r14),%rbp 19: 48 89 e8 mov %rbp,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 ef mov %rbp,%rdi 33: e8 1f dd c8 fd call 0xfdc8dd57 38: bb 90 00 00 00 mov $0x90,%ebx 3d: 48 rex.W 3e: 03 .byte 0x3 3f: 5d pop %rbp