loop0: detected capacity change from 0 to 32768 loop0: detected capacity change from 32768 to 32766 BUG at fs/jfs/jfs_dmap.c:3033 assert(bitno < 32) ------------[ cut here ]------------ kernel BUG at fs/jfs/jfs_dmap.c:3033! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-00233-g9fb2cfa4635a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:dbFindBits+0x1ce/0x1d0 fs/jfs/jfs_dmap.c:3033 Code: 97 08 90 0f 0b e8 b2 9b 67 fe 48 c7 c7 80 44 43 8c 48 c7 c6 c0 41 43 8c ba d9 0b 00 00 48 c7 c1 60 4c 43 8c e8 e3 e2 97 08 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 RSP: 0018:ffffc9000d1cf940 EFLAGS: 00010246 RAX: 0000000000000030 RBX: 0000000000000000 RCX: 393f9a2453d81f00 RDX: ffffc9000d422000 RSI: 00000000000012d9 RDI: 00000000000012da RBP: 0000000000000020 R08: ffffffff8174b1ac R09: fffffbfff1cfa3fc R10: dffffc0000000000 R11: fffffbfff1cfa3fc R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f322afd76c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d7e1d23850 CR3: 0000000043a8a000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dbAllocDmapLev+0x1e9/0x4a0 fs/jfs/jfs_dmap.c:1985 dbAllocCtl+0x113/0x920 fs/jfs/jfs_dmap.c:1825 dbAllocAG+0x28f/0x10b0 fs/jfs/jfs_dmap.c:1364 dbDiscardAG+0x352/0xa20 fs/jfs/jfs_dmap.c:1613 jfs_ioc_trim+0x45a/0x6b0 fs/jfs/jfs_discard.c:105 jfs_ioctl+0x2cd/0x3e0 fs/jfs/ioctl.c:131 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 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: 0033:0x7f322a17e759 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:00007f322afd7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f322a335f80 RCX: 00007f322a17e759 RDX: 00000000200000c0 RSI: 00000000c0185879 RDI: 000000000000000b RBP: 00007f322a1f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f322a335f80 R15: 00007ffd93237828 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dbFindBits+0x1ce/0x1d0 fs/jfs/jfs_dmap.c:3033 Code: 97 08 90 0f 0b e8 b2 9b 67 fe 48 c7 c7 80 44 43 8c 48 c7 c6 c0 41 43 8c ba d9 0b 00 00 48 c7 c1 60 4c 43 8c e8 e3 e2 97 08 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 RSP: 0018:ffffc9000d1cf940 EFLAGS: 00010246 RAX: 0000000000000030 RBX: 0000000000000000 RCX: 393f9a2453d81f00 RDX: ffffc9000d422000 RSI: 00000000000012d9 RDI: 00000000000012da RBP: 0000000000000020 R08: ffffffff8174b1ac R09: fffffbfff1cfa3fc R10: dffffc0000000000 R11: fffffbfff1cfa3fc R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f322afd76c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f322afb5f98 CR3: 0000000043a8a000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400