bh = 19 (type: exp=4, found=1) function = gfs2_meta_buffer, file = fs/gfs2/meta_io.c, line = 493 gfs2: fsid=syz:syz.s: about to withdraw this file system ------------[ cut here ]------------ kernel BUG at fs/gfs2/util.c:341! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4950 Comm: syz.0.16 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : gfs2_withdraw+0x11a4/0x129c fs/gfs2/util.c:341 lr : gfs2_withdraw+0x11a4/0x129c fs/gfs2/util.c:341 sp : ffff80001f236e60 x29: ffff80001f236f80 x28: 1fffe0001a58c057 x27: dfff800000000000 x26: ffff700003e46ddc x25: ffff80001f236ee0 x24: ffff8000117b85e0 x23: 000000000000e74f x22: ffff0000d2c60340 x21: ffff0000d2c600a8 x20: ffff0000d2c602bc x19: ffff0000d2c60000 x18: 0000000000000001 x17: 0000000000000000 x16: ffff80001125f22c x15: 00000000ffffffff x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a13ae90 x8 : ffff0000cc8d0000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80001f236778 x4 : ffff80001437f3e0 x3 : ffff80000850932c x2 : 0000000000000001 x1 : 0000000000000004 x0 : 0000000000000000 Call trace: gfs2_withdraw+0x11a4/0x129c fs/gfs2/util.c:341 gfs2_metatype_check_ii+0x8c/0xac fs/gfs2/util.c:520 gfs2_metatype_check_i fs/gfs2/util.h:129 [inline] gfs2_meta_buffer+0x258/0x2ec fs/gfs2/meta_io.c:493 gfs2_meta_inode_buffer fs/gfs2/meta_io.h:70 [inline] gfs2_inode_refresh+0xb0/0xdb4 fs/gfs2/glops.c:481 inode_go_lock+0xfc/0x38c fs/gfs2/glops.c:510 do_promote+0x668/0xa48 fs/gfs2/glock.c:507 finish_xmote+0x450/0xb0c fs/gfs2/glock.c:678 do_xmote+0x674/0xf58 fs/gfs2/glock.c:824 run_queue+0x3fc/0x698 fs/gfs2/glock.c:872 gfs2_glock_nq+0x828/0x1404 fs/gfs2/glock.c:1534 gfs2_glock_nq_init fs/gfs2/glock.h:246 [inline] check_journal_clean+0x12c/0x2f8 fs/gfs2/util.c:60 init_journal+0x1404/0x1e34 fs/gfs2/ops_fstype.c:832 init_inodes+0xe0/0x2d4 fs/gfs2/ops_fstype.c:891 gfs2_fill_super+0x1264/0x1a18 fs/gfs2/ops_fstype.c:1249 get_tree_bdev+0x358/0x544 fs/super.c:1325 gfs2_get_tree+0x54/0x1b4 fs/gfs2/ops_fstype.c:1332 vfs_get_tree+0x90/0x274 fs/super.c:1530 do_new_mount+0x228/0x810 fs/namespace.c:3034 path_mount+0x5bc/0x1008 fs/namespace.c:3364 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount fs/namespace.c:3562 [inline] __arm64_sys_mount+0x514/0x5f0 fs/namespace.c:3562 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1d0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Code: f94013e0 979c29b1 17fffef0 978d0c05 (d4210000) ---[ end trace b372fe9a367a825a ]---