EXT4-fs error (device loop0): ext4_free_branches:1030: inode #13: comm syz.0.5129: invalid indirect mapped block 1819239214 (level 0) EXT4-fs (loop0): Remounting filesystem read-only general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] CPU: 1 PID: 10349 Comm: syz.0.5129 Not tainted 6.1.134-syzkaller-00013-g53b26534cce7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:__ext4_journal_get_write_access+0xb0/0x6c0 fs/ext4/ext4_jbd2.c:231 Code: 8e ff 49 8d 5f 30 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 be b0 d2 ff 48 8b 1b 48 83 c3 38 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 a1 b0 d2 ff 4c 8b 23 4d 85 e4 4c RSP: 0018:ffffc90003217380 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000038 RCX: 0000000000080000 RDX: ffffc90000e59000 RSI: 0000000000015c9a RDI: 0000000000015c9b RBP: ffffc90003217450 R08: ffff8881187a1738 R09: 0000000000000001 R10: ffffed10230f50e8 R11: 1ffff110230f50e7 R12: ffff8881686ea47c R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8881187a1738 FS: 00007fe4a53956c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fafafc86000 CR3: 00000001512d5000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_free_branches+0x4f8/0x6b0 fs/ext4/indirect.c:1100 ext4_free_branches+0x2f3/0x6b0 fs/ext4/indirect.c:1049 ext4_ind_truncate+0x96b/0xb20 fs/ext4/indirect.c:1215 ext4_truncate+0x98e/0xf90 fs/ext4/inode.c:4292 ext4_process_orphan+0x1d9/0x320 fs/ext4/orphan.c:339 ext4_orphan_cleanup+0xb02/0x1210 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5510 [inline] ext4_fill_super+0x73ad/0x78f0 fs/ext4/super.c:5641 get_tree_bdev+0x444/0x680 fs/super.c:1368 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5671 vfs_get_tree+0x9a/0x270 fs/super.c:1575 do_new_mount+0x25a/0xa20 fs/namespace.c:3056 path_mount+0x675/0x1010 fs/namespace.c:3386 do_mount fs/namespace.c:3399 [inline] __do_sys_mount fs/namespace.c:3607 [inline] __se_sys_mount+0x318/0x380 fs/namespace.c:3584 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3584 x64_sys_call+0x65d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fe4a459010a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007fe4a5394e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fe4a5394ef0 RCX: 00007fe4a459010a RDX: 0000200000000440 RSI: 0000200000000480 RDI: 00007fe4a5394eb0 RBP: 0000200000000440 R08: 00007fe4a5394ef0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000480 R13: 00007fe4a5394eb0 R14: 0000000000000450 R15: 000000000000002c Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__ext4_journal_get_write_access+0xb0/0x6c0 fs/ext4/ext4_jbd2.c:231 Code: 8e ff 49 8d 5f 30 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 be b0 d2 ff 48 8b 1b 48 83 c3 38 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 a1 b0 d2 ff 4c 8b 23 4d 85 e4 4c RSP: 0018:ffffc90003217380 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000038 RCX: 0000000000080000 RDX: ffffc90000e59000 RSI: 0000000000015c9a RDI: 0000000000015c9b RBP: ffffc90003217450 R08: ffff8881187a1738 R09: 0000000000000001 R10: ffffed10230f50e8 R11: 1ffff110230f50e7 R12: ffff8881686ea47c R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8881187a1738 FS: 00007fe4a53956c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fafafc86000 CR3: 00000001512d5000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8e ff mov %edi,%? 2: 49 8d 5f 30 lea 0x30(%r15),%rbx 6: 48 89 d8 mov %rbx,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 12: 74 08 je 0x1c 14: 48 89 df mov %rbx,%rdi 17: e8 be b0 d2 ff call 0xffd2b0da 1c: 48 8b 1b mov (%rbx),%rbx 1f: 48 83 c3 38 add $0x38,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 a1 b0 d2 ff call 0xffd2b0da 39: 4c 8b 23 mov (%rbx),%r12 3c: 4d 85 e4 test %r12,%r12 3f: 4c rex.WR