------------[ cut here ]------------ WARNING: CPU: 0 PID: 11135 at fs/ext4/file.c:611 ext4_file_write_iter+0xe2a/0x19b0 Modules linked in: CPU: 0 PID: 11135 Comm: syz-executor.7 Not tainted 6.4.0-rc7-next-20230621 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:ext4_file_write_iter+0xe2a/0x19b0 Code: 02 84 c0 74 08 3c 03 0f 8e 81 0b 00 00 41 8b 5f 20 31 ff 83 e3 08 89 de e8 93 58 9c ff 85 db 0f 85 ef fc ff ff e8 e6 5c 9c ff <0f> 0b e9 e3 fc ff ff e8 da 5c 9c ff 48 8b 54 24 70 48 b8 00 00 00 RSP: 0018:ffff888043717c28 EFLAGS: 00010216 RAX: 00000000000006ef RBX: 0000000000000000 RCX: ffffc90005c21000 RDX: 0000000000040000 RSI: ffffffff81afcb4a RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: fffffffffffffff5 R13: 000000000000000c R14: ffff888043717db0 R15: ffff888043717e00 FS: 00007f27e34f4700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe068a89c60 CR3: 00000000400f0000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: vfs_write+0x97d/0xda0 ksys_write+0x122/0x250 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7f27e5f9fb19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f27e34f4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f27e60b3020 RCX: 00007f27e5f9fb19 RDX: 0000000000140000 RSI: 0000000020000200 RDI: 0000000000000003 RBP: 00007f27e5ff9f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffdb517baf R14: 00007f27e34f4300 R15: 0000000000022000 irq event stamp: 11097 hardirqs last enabled at (11107): [] __up_console_sem+0x78/0x80 hardirqs last disabled at (11204): [] __up_console_sem+0x5d/0x80 softirqs last enabled at (11288): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (11251): [] irq_exit_rcu+0x93/0xc0 ---[ end trace 0000000000000000 ]--- syz-executor.4: attempt to access beyond end of device loop4: rw=0, sector=0, nr_sectors = 1 limit=0 FAT-fs (loop4): unable to read boot sector syz-executor.4: attempt to access beyond end of device loop4: rw=0, sector=0, nr_sectors = 1 limit=0 FAT-fs (loop4): unable to read boot sector syz-executor.4: attempt to access beyond end of device loop4: rw=0, sector=0, nr_sectors = 1 limit=0 FAT-fs (loop4): unable to read boot sector loop5: detected capacity change from 0 to 40 vfat filesystem being mounted at /syzkaller-testdir430073541/syzkaller.rrHAKk/281/file0 supports timestamps until 2107-12-31 (0x10391447e) sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 40 00 blk_print_req_error: 1426 callbacks suppressed I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 32 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 buffer_io_error: 1430 callbacks suppressed Buffer I/O error on dev sr0, logical block 0, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 1, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 2, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 3 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 3, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 4 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 4, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 5 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 5, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 6 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 6, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 7 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 7, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 0, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev sr0, logical block 1, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer syz-executor.5: attempt to access beyond end of device loop5: rw=2049, sector=40, nr_sectors = 4 limit=40 audit: type=1400 audit(3834830194.109:26): avc: denied { map } for pid=11241 comm="syz-executor.1" path="pipe:[33624]" dev="pipefs" ino=33624 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=fifo_file permissive=1 audit: type=1400 audit(3834830194.132:27): avc: denied { execute } for pid=11241 comm="syz-executor.1" path="pipe:[33624]" dev="pipefs" ino=33624 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=fifo_file permissive=1 random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption Restarting kernel threads ... done. loop6: detected capacity change from 0 to 40 vfat filesystem being mounted at /syzkaller-testdir187947207/syzkaller.m5Oche/77/file0 supports timestamps until 2107-12-31 (0x10391447e) tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' loop5: detected capacity change from 0 to 40 vfat filesystem being mounted at /syzkaller-testdir430073541/syzkaller.rrHAKk/295/file0 supports timestamps until 2107-12-31 (0x10391447e) syz-executor.5: attempt to access beyond end of device loop5: rw=2049, sector=124, nr_sectors = 4 limit=40 loop5: detected capacity change from 0 to 40 FAT-fs (loop5): Unrecognized mount option "./file0" or missing value random: crng reseeded on system resumption random: crng reseeded on system resumption loop5: detected capacity change from 0 to 40 vfat filesystem being mounted at /syzkaller-testdir430073541/syzkaller.rrHAKk/297/file0 supports timestamps until 2107-12-31 (0x10391447e) syz-executor.5: attempt to access beyond end of device loop5: rw=2049, sector=124, nr_sectors = 4 limit=40 buffer_io_error: 8 callbacks suppressed Buffer I/O error on dev loop5, logical block 31, lost async page write loop5: detected capacity change from 0 to 40 vfat filesystem being mounted at /syzkaller-testdir430073541/syzkaller.rrHAKk/298/file0 supports timestamps until 2107-12-31 (0x10391447e) syz-executor.5: attempt to access beyond end of device loop5: rw=2049, sector=124, nr_sectors = 4 limit=40 Buffer I/O error on dev loop5, logical block 31, lost async page write SELinux: security_context_str_to_sid (unconfined_u) failed with errno=-22 SELinux: security_context_str_to_sid (unconfined_u) failed with errno=-22