EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode BUG: kernel NULL pointer dereference, address: 000000000000000b #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 8000000026b5e067 P4D 8000000026b5e067 PUD 533fd067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 6160 Comm: syz.0.34 Not tainted 6.12.0-rc6-syzkaller-00192-gf1dce1f09380 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:PageTail include/linux/page-flags.h:281 [inline] RIP: 0010:const_folio_flags include/linux/page-flags.h:309 [inline] RIP: 0010:folio_test_active include/linux/page-flags.h:518 [inline] RIP: 0010:slab_test_pfmemalloc mm/slab.h:171 [inline] RIP: 0010:pfmemalloc_match mm/slub.c:3550 [inline] RIP: 0010:___slab_alloc+0x1f4/0x14b0 mm/slub.c:3691 Code: f7 44 24 60 00 02 00 00 44 8b 74 24 10 0f 85 59 06 00 00 41 f7 c5 00 02 00 00 4c 8b 3c 24 0f 84 5c fe ff ff fb e9 56 fe ff ff <49> 8b 44 24 08 a8 01 0f 85 d6 07 00 00 0f 1f 44 00 00 49 f7 04 24 RSP: 0018:ffffc9000501f6d8 EFLAGS: 00010246 RAX: 717b3d8d7e7ae100 RBX: 00000000ffffffff RCX: ffffffff825fe9e3 RDX: 00000000ffffffff RSI: 0000000000000d40 RDI: ffff888078f81500 RBP: ffff888078f81500 R08: ffffe8ffffc68140 R09: 0000000000000120 R10: dffffc0000000000 R11: fffffbfff2037bb6 R12: 0000000000000003 R13: 0000000000000d40 R14: 00000000ffffffff R15: ffff888078f81500 FS: 00007f69d7bf66c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000000b CR3: 0000000012b7e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __slab_alloc+0x58/0xa0 mm/slub.c:3908 __slab_alloc_node mm/slub.c:3961 [inline] slab_alloc_node mm/slub.c:4122 [inline] kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4141 ext4_mb_add_groupinfo+0x6c3/0xfa0 fs/ext4/mballoc.c:3356 ext4_mb_init_backend fs/ext4/mballoc.c:3435 [inline] ext4_mb_init+0x15ab/0x27e0 fs/ext4/mballoc.c:3733 __ext4_fill_super fs/ext4/super.c:5512 [inline] ext4_fill_super+0x5f4c/0x6e60 fs/ext4/super.c:5686 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f69d977feba 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:00007f69d7bf5e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f69d7bf5ef0 RCX: 00007f69d977feba RDX: 0000000020000040 RSI: 0000000020000180 RDI: 00007f69d7bf5eb0 RBP: 0000000020000040 R08: 00007f69d7bf5ef0 R09: 000000000001000e R10: 000000000001000e R11: 0000000000000246 R12: 0000000020000180 R13: 00007f69d7bf5eb0 R14: 0000000000000445 R15: 0000000020000300 Modules linked in: CR2: 000000000000000b ---[ end trace 0000000000000000 ]--- RIP: 0010:PageTail include/linux/page-flags.h:281 [inline] RIP: 0010:const_folio_flags include/linux/page-flags.h:309 [inline] RIP: 0010:folio_test_active include/linux/page-flags.h:518 [inline] RIP: 0010:slab_test_pfmemalloc mm/slab.h:171 [inline] RIP: 0010:pfmemalloc_match mm/slub.c:3550 [inline] RIP: 0010:___slab_alloc+0x1f4/0x14b0 mm/slub.c:3691 Code: f7 44 24 60 00 02 00 00 44 8b 74 24 10 0f 85 59 06 00 00 41 f7 c5 00 02 00 00 4c 8b 3c 24 0f 84 5c fe ff ff fb e9 56 fe ff ff <49> 8b 44 24 08 a8 01 0f 85 d6 07 00 00 0f 1f 44 00 00 49 f7 04 24 RSP: 0018:ffffc9000501f6d8 EFLAGS: 00010246 RAX: 717b3d8d7e7ae100 RBX: 00000000ffffffff RCX: ffffffff825fe9e3 RDX: 00000000ffffffff RSI: 0000000000000d40 RDI: ffff888078f81500 RBP: ffff888078f81500 R08: ffffe8ffffc68140 R09: 0000000000000120 R10: dffffc0000000000 R11: fffffbfff2037bb6 R12: 0000000000000003 R13: 0000000000000d40 R14: 00000000ffffffff R15: ffff888078f81500 FS: 00007f69d7bf66c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000000b CR3: 0000000012b7e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: f7 44 24 60 00 02 00 testl $0x200,0x60(%rsp) 7: 00 8: 44 8b 74 24 10 mov 0x10(%rsp),%r14d d: 0f 85 59 06 00 00 jne 0x66c 13: 41 f7 c5 00 02 00 00 test $0x200,%r13d 1a: 4c 8b 3c 24 mov (%rsp),%r15 1e: 0f 84 5c fe ff ff je 0xfffffe80 24: fb sti 25: e9 56 fe ff ff jmp 0xfffffe80 * 2a: 49 8b 44 24 08 mov 0x8(%r12),%rax <-- trapping instruction 2f: a8 01 test $0x1,%al 31: 0f 85 d6 07 00 00 jne 0x80d 37: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 3c: 49 rex.WB 3d: f7 .byte 0xf7 3e: 04 24 add $0x24,%al